Every time I re-start, the Default Gateway information is missing from the Network connection. I have to re-fill in the information and reset to get the Internet connection back.ipconfig/all results belowIP address should be 192.168.0.215Gateway should be 192.168.0.1
Microsoft Windows [Version 6.0.6002]Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Users\Bob>ipconfig/all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Desktop Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection 4:
Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Belkin Description . . . . . . . . . . . : NVIDIA nForce Networking Controller #4 Physical Address. . . . . . . . . : 00-50-8D-91-A2-83 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Local Area Connection 3:
Connection-specific DNS Suffix . : Description . . . . . . . . . . . : NVIDIA nForce Networking Controller #3 Physical Address. . . . . . . . . : 00-50-8D-91-A2-82 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::e160:5968:41ca:98ea%11(Preferred) Autoconfiguration IPv4 Address. . : 169.254.152.234(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : 0.0.0.0 DHCPv6 IAID . . . . . . . . . . . : 201347213 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-0D-C4-03-60-00-50-8D-91-A2-82
DNS Servers . . . . . . . . . . . : 192.231.203.132 192.231.203.3 NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter Local Area Connection* 6:
Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : isatap.Belkin Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Local Area Connection* 9:
Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface Physical Address. . . . . . . . . : 02-00-54-55-4E-01 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Local Area Connection* 12:
Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : isatap.{03D49CF9-3A8D-4619-B822-B7B39441E680} Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes
C:\Users\Bob>

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I assume the one you are using isLocal Area Connection 3. It is getting an address from Autoconfiguration.It is not getting an address from a DHCP server. Ifyou normally gets the address from DHCP, such as from your broadband router, you can try ipconfig /release and then ipconfig /renew. If this works, you can set the correct ip, gateway, and DNS addresses as an Alternate Configuration in the TCP/IP Properties page.When an Alternate Configuration is configured, it is supposed to use this if DHCP fails, and notuse Windows Autoconfiguration.Otherwise, you can set static addresses in the IP v4 properties page.To open the IP v4 properties page, open the Network and Sharing Center in the Control Panel. Then select "Manage Network Connections" on the left side. In the next window, select "Local Area Connection 3" and chose "change settings..." or File\Properties. Then select "...IP v4", and then the Properties button.

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Thanks for that but that is exactly the problem. I set up a static address in IP v4 properties and it works fine until I reboot, it then reverts to the ipconfig that I pasted and I have to re-set it again. I have seen a few other posts here with people having a similiar problem so I don't think it's only me. Sure I can do a release/enew but this never happened with Vista original or SP1, only since running SP2 so I am gussing it's an SP2 bug ??

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You could try editing the registry and add the IPAutoconfigurationEnabled dword value to the interface'skey. See: Configuring IP Addressing and Name Resolution.There are reports that this doesn't work, however.

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I guess it is another idea, but it still doesn't answer why SP2 is doing this?

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Hi,Thanks for reporting this issue. Our engineers are trying to repro the issue internally and we'll contact you as and when needed.ThanksArunWe build Service Pack 2

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Hi,Sorry that you are seeing this issue. Can you give following details which will help us understanding your scenario in better way: -1) Can you elaborate exact steps to reproduce this problem and also the workaround to resolve this issue.2) Also did you see this issue only after installing SP2. Was it working prefectly fine with SP1.3) Did you install any oher app/software and think could have triggered this scenario ?Thanks,Sachin

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1) Any reboot produces this problem. If I then look at TCP/IP properties, the Gateway address is blank. Filling in the Gateway address immediately doesn't work, I have to set up Auto IP address then go back and complete manual IP address, all is then OK to next reboot2) Only after SP2 install3) nothing that I can remeber or that seems relevant

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Yes.I had the exact same problem with SP2 Beta on Windows 2008 Server x64.I uninstalled the Service Pack and the problem went away.I did not have the problem afterI installed the SP2 RC.But then I had activation and MGA problems.After a miserable time uninstalling the RC, I am now re-activated and at SP1 level.

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Thanks for that egads, but I'm afraid that everything is as it should be. We will wait and see if any of the MSFT come up with any answers

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Good choice, Egads.

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Hi,Thanks for reporting this issue. We would like to delve more on to this issue.
Please log a bug report usinghttp://connect.microsoft.com/InvitationUse.aspx?ProgramID=2730&SiteID=749&InvitationID=CPP-G93D-QDHHDo post back the feedback ID for our reference.
Thanks,Sachin

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I had previously reported this to Microsoft Support.See:1093400863.

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Sachin, Bug Report submitted ID- 427221Thanks

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Received a reply to the Bug report suggesting to remove Apple Bonjour as this could be causing the problem. Removed Bonjour but problem still the same

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I submitted information that you requested on March 31st. to the Bug report ID- 427221Since then I have never had any reply. Did you get the new info? Is there any news?

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Is this on a SBS server (or SBS network?) Comment out the setup.exe line in the logon script and then give it a few reboots to test.

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Thanks for your thoughts, the answer is no, this is a stand alone machine running Vista Ultimate. I've at last got kind of fed up messing around and removed SP2 and, as I expected, the problem disappeared. There is some kind of bug in the SP that caused it whatever it is. I would love to have had more time to get to the bottom of it, but time is precious. Thanks to all the repliers and if anyone has any better ideas, we'll have another go. Good luck to all

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Just a last word on the above issue. I upgraded from Vista to Windows 7 RC at the weekend and ended up with exactly the same issue. I guess there is something in this machine which is causing the problem, but, after much distress, I seem to have found a work around. If I set up my fixed IP in IPv4 configuration and also set up exactly the same as an Alternate Configuration, everything is now stable after many reboots. Exactly why, I don't know but maybe this will help someone else out if they experience the same problem(By the way, Windows 7 is running beautifully)

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I also had that problem with Vista SP2 and internet. I have added some named values to one registry key and now I have SP2 installed and a stable connection. After SP2 -installation I made the registry changes.The key is: HKLM/System/CurrentControlSet/Services/Tcpip/Parameters/Interfaces/X?X? meansthe ID for the concerned NIC.Thenamed values are: AddressType REG-Dword 0x00000000 and IPAddress Reg_Multi_SZ 192.168.2.20 (for example)and SubnetMask Reg_Multi_SZ 255.255.255.0and DefaultGateway Reg_Multi_SZ 192.168.2.1 (for example).Then I have renewed the persistent route in : HKLM/System/CurrentControlSet/Services/Tcpip/Parameters/PersistentRoutes by the value 0.0.0.0,0.0.0.0,192.168.2.1,-1This value one can find with the help of route print .In TCP/IP properties was to set the gateway. Before installing SP2 one could use the netsh-command to disable the autoconfiguration to avoid the APIPA for the workstation IP . In my case is internet over Wlan : netsh wlan set autoconfig enabled=no After changing the registry type: netsh wlan set autoconfig enabled=yes and the connection was established.Maybe it is a little bit helpful.

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I still haven't tried SP2 again. I guess I don't want the hassle.

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I have the same Problem: After updating from Vista SP1 to SP2 (Windows6.0-KB948465-X86) the PC gets an empty default gateway after rebooting. This behaviour is really annoying - especially when you install the SP2 over a remote connection. I can't understand why MS released the SP2 with this bug ..also it's known since two months.

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I don't know if it is the same problem or a related one, but after installing SP2 last night, TCP/IPv4 was no longer bound to any of my network adaptors - it had simply dropped of the list of items the connection uses. Furthermore, it was not available to install.

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Good Morning, last night i update my Vista Home Premium with installed SP1 to SP2 offical release. And i get the same error, i can read in this thread. I can confirm, that Vista lose standardgateway entry if you use fix-ip setting (in my case IPv4) If i configure it manual again, it work until next reboot. If i use DHCP-Configuration all works fine. In this scenario (missing Standardgatway) network identification failure and you see only local connection can be use. (I use a w-lan connection) Is it possible, thats a general problem with SP2??? I hope of an resolution as soon as possible. :-) Nice Day.

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There is a known issue with Apple andKaspersky NDIS filter driver who add 0.0.0.0 as default gateway. This causes loss of internet connectivity. There is a kb article
http://support.microsoft.com/kb/970313for
the same. If you are seeing 0.0.0.0 address in your default gateway list you would need to delete that to get the connectivity back. You may change the bonjour service type to manual to stop seeing the issue thereafter. If you are getting an empty default gateway list that may be some other issue. In that case can you please provide the following info:1. ipconfig /all output before and after reboot.2. output of systeminfoThanks in advance,Umesh

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Hello,I do had the same with three Vista Units... There is a known workaround available from NetSet Man...
http://www.netsetman.com/support/viewtopic.php?pid=832#p832It
help on my system(s)

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I also had Internet connectivity problems after installing Vista SP2. DHCP is disabled on my router; the PC is configured with a static IP address. After the SP2 installation, the PC did not connect to the Internet. I was able to get it to connnect by toggling network connection properties, but I had to repeat the process after every reboot.
To fix the problem, I had to reset the Internet Protocol as described in the
http://support.microsoft.com/kb/299357
article. I did the following:

Run a Command Prompt as Administrator and enter the following command (in step 2).
netsh int ip reset
Reboot.
Go to Network and Sharing Center > Manage network connections and change the settings of the network connection by configuring the TCP/IPv4 properties with the IP address, default gateway, etc.

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i got the same problem with 2 vista units both lose there gateway setting on reboot.i use a static ipaddress for both oif themi have triedthe workarounds that have suggestedbut stillthe same problem.thank i will uninstall sp2 and wait unitl the is a new build of it

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Hi Whibbs,Before uninstalling it .. could you please share the regsitry dump for following key"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces".Please send it to satyendra.mishra@live.com.sg Thanks,Satyendra

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HiBit of a 'me too' post I'm afraid. I have the same issue on three laptops after installing SP2 last week. The defaulty gateway address vanishes after the restart. No matter how many times you put it back it still disappears on rebooting. So far as I am aware the 'bonjour' app has never been installed on these machines.Using Auto-acquire works around the problem but I would be very pleased to know of a solution that will enable the use of static IP addresses as we sometimes have scenarios where these are needed.Mnay thanks for any helpSteve

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I agree with your conclusion. I have removed SP2 and the persistant problem of the gatway disappearing at each reboot stopped. I am not sure if there is a work around, I spend over two hours trying all combinations of trying to get the gateway address to stay (when static info is inserted) DHCP works fine, but I need to set static data, as I have a few persistant routes setup.I will wait for the patch for SP2 as well

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I re-installed my server, and then let Windows Update install SP2 (KB948462).Networking now works the way it should. Manually configured settings stay set and don't revert to autoconfig or dhcp.

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I can confirm that one of my Windows Server 2008 Ent x64 servers also experienced this issue with lost gateway. The only thing that helped was removing SP2, now it works ok.

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Hello, I do had the same with three Vista Units... There is a known workaround available from NetSet Man...
http://www.netsetman.com/support/viewtopic.php?pid=832#p832
It help on my system(s)
Thanks, that solves it. It's clearly a case of SP2 corrupting a registry entry and the TCP/IP service not validating what it gets from the registry.

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Rapid...THANK YOU FOR POSTING THIS! Been racking my brain trying to figure this out on my W2K8 SP2 virtual machines and only one of 6 had this happen. Your link explaining the blank line entry and how to remove it worked like a CHARM!

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I can confirm this a SP2 problem, at least in Windows Server 2008 Enterprise x64. I have downloaded the FULL OS ISO file with SP2 pre-installed directly from MS's licensing portal. After installing 4 clean copies in virtual environments I can confirm that all 4 instances lose the gateway upon the first reboot after configuring static TCP information including (ip, mask, gw, DNS1, DNS2).
Upon reboot all four had blank gateways, not even "0"s. Following the tip from
http://www.netsetman.com/support/viewtopic.php?pid=832#p832
I noticed that the reg keys "DefaultGateway" and "DefaultGatewayMetric" are completely missing from the following location:HKLM/System/CurrentControlSet/Services/Tcpip/Parameters/Interfaces/%CLSID%
After manually adding the missing values all four servers rebooted fine and retained their gateways.
NOTE: The commands "netsh int ipv4 reset, netsh int ipv4 uninstall, & netsh int ipv4 install", with reboots in between, did not help fix the problem.Hope this helps..

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So what now? Will we receive an official response from MS on this matter?? It is obvious something is wrong with the SP2..Also, I don't get it how can they miss such a flaw with all their extensive testing they always mention they do prior the release?

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I have the same problem - solved by disable the network device and enable. (WIN7 RC1)

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I have the same problem - solved by disable the network device and enable. (WIN7 RC1)
Maybe, but does it last through reboot?

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Thanks sooo much pigglety !!! TCP/IP reset is the definite answer to the problem !!!
http://support.microsoft.com/kb/299357


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Doing the netsh commands didnt work for us either. Adding the reg keys in manually worked though. Thanks.Note that this hasnt effected all our SP2 installations, only specific ones. I got round this before in vmware by removing and adding a new network adapter but in one case this didnt work so i ended up googling it and found this.MS really need to acknowledge this and fix the SP2 download for future installs then release a HF for existing installs.

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The rebuilding of the TCP/IP stack works fine but... how do I do this on 400 domain computers without going to each computer? (geographically scattered throughout the province)

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if your computers are connected, create a batch script as follows:netsh int ipv4 uninstallnetsh int ipv4 installplace the script on some shared folder and use psexec tool to run it remotely. Something like this:psexec @computers.txt -i -u Domain\Administrator -pAdmin password \\computer\folder\Scripts\your_script.batHow to use psexec read on
http://technet.microsoft.com/hr-hr/sysinternals/bb897553(en-us).aspx


GorkyLed

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I would like to "awake" this thread again because I have ran into the same problem. But mine is not that easy to solve. We are using VMware and are using the "Template" function (sysprep along with answer files) and the Customization Specifications Manager i vCenter to deploy our Windows 2008 Server VMs. After updating the template with SP2 we have ran into big problems. It seems like SP2 clears the Default Gateway. In the answer file anew ip is set and also joins the domain.Joining the domain works fine but when the server is deployed and I try to log into our domain I get the "No logon server available". If I log in locally I can see that the Default Gateway is blanked out. The IP, Subnet Mask, DNS is still there though. The problem can be solved with:netsh int ip reset, but I dont want to do that everytime a deploy a new server. Is there any solution that I can apply before I sysprep the server that will stick?
Any suggestions what to do?

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how about a reg import of the relevant key Johan?

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how about a reg import of the relevant key Johan?
I don't think that will do it.The IP stack has to be reset. Otherwise, it just uses the values in memory.

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Correct, that do not do the trick....the problem still remains att its driving me nuts.

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Just an update from our end. In VMware, in contrast to what Johan found, if i use my templates with a new Customisation Specification then it keeps the network settings and it all works. I converted my templates to VMs logged into them and checked their networks settings are ok and i can see them on the network, i then converted these back to templates, created a new Customisation Specification which sets the IP on the servers then deployed a couple to test and they both worked fine, appeared on the network after the Customisation Spec ran through.Now whats strange is that the customisation spec just runs a sysprep after the OS starts, now i had the lost default gateway after doing a sysprep manually after creating a VM (as i hadnt created a customisation spec yet), now ive created a customisation spec it seems fine... even though its doing the same thing and just running sys prep.... strange.

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I tried resetting it this way unfortunately I did not have any success.... Maybe this will help someone as I had to do it this way...Open Device ManagerClick View/Show Hidden DevicesExpand Non-Plug and Play DriversRight click TCP/IP Protocol Driver and click Uninstall. Say no to the reboot.Right click TCP/IP Registry Compatibility and click Uninstall. Say yes to REboot...The computer may stall out a bit on reboot as it reinstalls these drivers...When you check your ipconfig it will still show 169.*.*.* however if you go to your connection to set the IP it will show it set to Static with all blank fields.. Set the values and click OK. Verify that the settings hold by doing a reboot... You will also notice the reg values now propogate...HKLM\SYSTEM\CURRENTCONTROLSET\Services\Tcpip\Parameters\Interfaces\"then the interface"Hope it helps... frustrating issue!

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Add me to the list of victims to this particular bug. My position: A machine created on a VMware platform with Server 2008 R2, then with IIS+.Net installed, then sysprep'ed and cloned to three more machines. Note: ALL FOUR VM's, after getting Sysprep'ed, and then cloned, had this problem! When I first noticed it happening, I too was getting the conflicting information from the GUI and ipconfig. that gave me the idea to uninstall the Network Adapter from Device Manager, then reboot the system, and let the OS re-discover it. This worked on the first machine I tried it on. I think on the next two, I actually did not reboot, but after removing the network adapter, merely right-clicked on the root of the control panel hardware manager tree and selected "Scan for new hardware", and let it re-add the adapter. This might have been a mistake. However, after doing that, I then tried the removal of the network adapter and rebooting it; that still did not seem to fix the problem. WHY would the Default Gateway just disappear like that? I am now attempting to sysprep & restart the second machine. I am going to try "Lord Beetle"'s suggestion of blowing away the TCP/IP stack drivers. Who cares, they're dev VM's anyway. :D Schmeckendeugler

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ok i typed in a bunch of stuff, then hit a link, tried to go back button and this form got reset. so i'm giving you a short version of what all I had typed. I had four VM's, two of which required me to remove the hardware interface in control panel then reboot. the 3rd, i had to do netsh int ip reset then reboot. Then manually set my IP again. the worst, the 4th, I had to run netsh int ip reset THEN reboot, then manually set the IP, which instantly broke as I watched the network interface attempt to connect. Then I ran regedit and browsed to HKLM/System/CurrentControlSet/Services/Tcpip/Parameters/Interfaces/{clsid}/DefaultGateway and I had to clear out a bogus entry in that registry key. This has been a frustrating 5-6 hours of my life, mostly because RDP'ing to my Terminal Server running VSphere and using a virtual console, heinous mouse lag and I can't even move the mouse pointer but 1 mph. So Annoying!

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It may be a bit unrelated, but to get rid of that mouse lag, make sure that you've got the latest VMWare tools installed on the VM, then right-click on your desktop and go to personalize. Select "Display Settings". Click "Advanced Settings...", then go to the "Troubleshoot" tab. Click "Change settings" and set your hardware acceleration to "Full".

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I too had this problem on a Windows 2008 SBS system running under Hyper-V. By following this link:
http://www.netsetman.com/support/viewtopic.php?pid=832#p832and
deleting a blank line in the registry key prior to the defaut gateway value, it solved the problem. Clearly this is a MS glitch and should have been resolved by now via Windows Update.

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After 2 months of torture and finally having solved my corrupt photos issue, I am happy to say, "DON'T INSTALL SP2!".After uninstalling SP2 both my default gateway issue went away and my corrupt photos issue went away. Now if my media center extender issue is fixed too well... I'll be jumping for joy!...kinda makes you want to ditch microsoft and move over to the dark side with Apple!

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Hi We want to deploy SP2 using WSUS and during our preleminary test we saw the same error. With SP2 installed we loose the gateway after every reboot. The Registry "trick" did solve the problem. But this is no solution for our complete range of computers. How do you expect business users to solve this? Deploy the update, the day after deploy a script/.reg to solve the issue? This leaves a few hundreds computers without network connection for some period. Is there any "useable" fix available for this? If not there will be no SP2 deployed here...

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Note: this is happening in Windows 7 now. I'll try the solution tonight. I find it unacceptable that a Vista bug from early 2009 shipped with 7 and MS has not fixed it.

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I use Windows 7 and I recently disabled DHCP and manually configured the IP address. Everytime I restart the system, I find the Default Gateway value is missing and I have to enter it again.

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Ditto for my Windows 7 installation .
I lose the connection to the internet and the troubleshooter can't find any problems but if I disable the network adapter and re-enable it, I get the gateway back.

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Windows 7 Professional 64 bit OEM suffers also from lost gateway address after reboot.

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I am having the same issue with Windows 7 Ultimate 64 bit Retail.

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I agree its unacceptable. The problem goes back even futher than Vista - It has been a problem since Windows XP initial release. Yes its now in Windows 7. The Wireless LAN adaptor finds an access point but can not connect because (as shown when you run IPCONFIG) "Media Disconnected" the only work arounds I have found are:
WINDOWS XP: netsh int ip reset reset.log netsh winsock reset catalog - also in the registry HKLM/Serv/Ccset/TCPIP/Parm a new parameter DisableDHCPMediaSense with a Dword value of 1
WINDOWS Vista and Windows 7 (run as administrator) netsh winsock reset catalog netsh int ipv4 reset rest.log netsh int ipv6 reset reset.log The registry patch for XP works also.

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Thank you Grey_Tech that fixed my problem rebooted PC after doing as suggested then another reboot and the info was still there. :)

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I agree its unacceptable. The problem goes back even futher than Vista - It has been a problem since Windows XP initial release. Yes its now in Windows 7. The Wireless LAN adaptor finds an access point but can not connect because (as shown when you run IPCONFIG) "Media Disconnected" the only work arounds I have found are:WINDOWS XP: netsh int ip reset reset.log netsh winsock reset catalog - also in the registry HKLM/Serv/Ccset/TCPIP/Parm a new parameter DisableDHCPMediaSense with a Dword value of 1WINDOWS Vista and Windows 7 (run as administrator) netsh winsock reset catalog netsh int ipv4 reset rest.log netsh int ipv6 reset reset.log The registry patch for XP works also. I had a similar problem with W2K8 Standard with SP2. The Default Gateway disappeared after each reboot. I ran three commands suggested by Grey_Tech (see below) then rebooted the server, reinserted all IP settings, rebooted and all was good. The DG stayed.netsh winsock reset catalognetsh int ipv4 reset rest.log netsh int ipv6 reset reset.log

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Please forgive me for replying again; I had not thought at the time that replying to your own post might be more productive.


My problem is similar (but static not DHCP addressing) and quite grievous since I am about 120 miles away; after reboot I cannot reach the server.
I am running Windows Server 2008 R2 64 bit on a production server (web edition, Dell R300). This is a multi-homed server and each time I add an IP address (IPV4) to the machine all other (IPV4) IPs disappear after reboot (though they are visible in the network
properties dialog). No IP responds even, even to pings, until I use the TCP/IP reset:
netsh int ip reset resetlog.txt
Then I have to manually type all the ips again in the TCP/IP advanced dialog. When I look at the
'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{MY_ADAPTERS_GUID}\IPAddress'
key, the only one present is the last one I typed. Thus when I reboot that will be the only IP on the machine (but the IP shown in the IPV4 network dialog will be completely blank).

The default gateway is kept, however, so the machine actually can communicate if I remember the last IP I added. But so far this has happened 3 times and each time I have to hire an IP KVM device to work with the server.
Would the changes you described above fix this problem? (or, at least, do you think they might _cause_ problems if I try them on this operating system?)

I dread applying security patches because it will require a reboot and all sites will be down (except the last IP I added) until I reset the TCP/IP and re-enter the addresses (though now I have a script to do it more quickly, as long as I remember
to keep my text list current).
Thanks in advance for any help you can offer.

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I agree its unacceptable. The problem goes back even futher than Vista - It has been a problem since Windows XP initial release. Yes its now in Windows 7. The Wireless LAN adaptor finds an access point but
can not connect because (as shown when you run IPCONFIG) "Media Disconnected" the only work arounds I have found are:
WINDOWS XP: netsh int ip reset reset.log netsh winsock reset catalog - also in the registry HKLM/Serv/Ccset/TCPIP/Parm a new parameter DisableDHCPMediaSense with a Dword value of 1
WINDOWS Vista and Windows 7 (run as administrator) netsh winsock reset catalog netsh int ipv4 reset rest.log netsh int ipv6 reset reset.log The registry patch for XP works also.



I had a similar problem with W2K8 Standard with SP2. The Default Gateway disappeared after each reboot. I ran three commands suggested by Grey_Tech (see below) then rebooted the server, reinserted all IP settings, rebooted and all was good.
The DG stayed.
netsh winsock reset catalog
netsh int ipv4 reset rest.log
netsh int ipv6 reset reset.log


It worked for me initially, however, later when I reboot, the same problem happened. Damn it!

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Taken from

http://www.netsetman.com/support/viewtopic.php?pid=832#p832

Solution
1. Open the registry with regedit.exe
2. Go to the path: HKLM/System/CurrentControlSet/Services/Tcpip/Parameters/Interfaces/
3. Here you'll need to select the CLSID of your networkadapter where you change the settings. You'll probably recognize it by looking at the value IPAddress that will have the IP of this adapter.
4. Open the value "DefaultGateway" by doubleclicking it. You will see a list of all the gateways that disappeared! (maybe in your case it will be only one, in my case there were due to lots of testing several addresses) Very likely, the first line will be empty.
I'm not sure, how this little flaw can make such a big problem. However, if you manually remove this first empty line, click OK and reboot your system everything should be working fine again.

After doing this, everything seemed normal to me. I could change the GW manually and by NSM. After a reboot everything was still there. Of course it needs to be verified in a long-term use if it fixes it forever or if the problem comes back at some point.
Thank you Ilja Herlein!Tyler McLaughlin

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my default gateway always disappeared after reboot on windows 7 64bit, to reset TCP/IP fixed my problem,
thanks to everybody for the help.
i used the command netsh int ip reset c:\resetlog.txt
in cmd admin mode.

http://support.microsoft.com/kb/299357/en-us
:
how to reset Internet Protocol (TCP/IP)

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Look for the Registry ke ubder interfaces EnableDeadGWDetect Set it to 0. This will resolve the issue.

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do you installed Adobe Photoshop CS3 ?

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My resolve is :
* 973243 Hotfix
* hkey_local_machine\system\currentcontrolset\services\tcpip\parameters\interfaces\interface\
click and type the unique gateway.

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My resolve is :
* 973243 Hotfix
* hkey_local_machine\system\currentcontrolset\services\tcpip\parameters\interfaces\interface\
click and type the unique gateway.

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Finally! I'd been searching for this answer for a while. I had the same problem & could recreate it by just disabing & re-enabling the NIC. When I looked in the registry the default gateway was blank, when I opened te reg key it did have the manual
IP Iput in there but there was a whole line above it. I removed that space & viola. Thanks for the post.

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Thanks for feedback.

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Thanks for feedback.

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Sorry to dredge up an old topic, but I just wanted to let everyone know this NetSetMan post rapidmove linked to fixed the problem for me, too. Same exact problem on Vista 64-bit. Easy fix.

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The reg addr worked for me too. i found a carriage return in the reg entry with the gw and removed it so just showed the gw. it worked. whats up with this? maybe had something to do with hyperv that was installed on that box (w08r2).

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