Hello all. I need some help with my computer. I don't know what exactly is wrong, only that the thread title is what it says when I try to diagnose the problem. I'm experienced with computers, but just need to know what steps to take to fix this.Tried restarting, tried turning on/off modem. Everything is plugged in.BTW using WIRED connection to DSL modem/router. It is a wireless modem too. I'm connected tothe modemright now through a laptop and Vista.

Hi Walter, Thanks for posting,Based on other issues i've seen with Windows 7 I would suggest going to your device manager and try a rollback of your driver.If the problem didn't occur previously, I would try to do a system restore to a point where it was still working...Hopefully this sorts your problem out!Filip Wilms

I recently installed windows 7 RC and everything worked perfectly for the first day. On returning home from work i lost internet connectivity. My other machines connect fine however if i put my dsl line directly into my network port or through my router i get no internet. the networking aspects through my router is good, i can copy files from my laptop and ping it. when i run inconfig on it (connected to the router) i get the following IPv4 Address...........:192.168.2.3 Subnet Mask............:255.255.255.0 Default Gateway.......:0.0.0.0 192.168.2.1 I assume the 0.0.0.0 address is what is causing the problem. I have it set to auto IP configuration but even if i manually put in values i get 0.0.0.0 address coming up. I did a fresh install with formatting the drive so the drivers loaded for the mother board came from the win 7 dvd. My PC is as follows ECS Elitegrouo Motherboard - Geforce 6100PM-M2 AMD Athlon 64 X2 Dual Core 5000+ 2.60 GHz 4GB RAM Windows 7 Ultimate 32Bit OS Thanks for the future help... PS: I've tried resetting bout my router and dsl modem here is a screen shot of my ipconfig... http://gcpbqw.bay.livefilestore.com/y1prKnWQf4iNpUbzoZakTRbL_iwGGPEFxlyzckJhbVW7CSag1aNKJI3JRll2ujh9RmJT1PSyTKfCzvjXVS2RBYe-phpl0fXMFj2/screenshot.jpg

i got the answer to my problem... found it here http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/2c0af923-24bb-4de2-95a7-9a9d4f64a8b0

My search for the answer to this took me everywhere. I got mine fixed and nobody else seems to have done it this way, so I wanted to pass on this cure in hopes it might save someone a lot of time. First of all I live in a Best Western Hotel (not a motel) and they have EXCELLENT tech support. The BW tech support guy unblocked me from wherever he lives at the other end of the phone. He spent a total of about a minute doing this. Here's what happened and what he did. The Problem My computer's wireless and Ethernet adapters were physically blocked from the router. I had an Unknown network and got the dreaded 651 error and the message, Local area connection doesn't have a valid IP configuration . How'd that happen? I was using an add-on to Firefox to check my bookmarks for dead links. I can't remember which add-on it was because I reverted to an earlier version of my OS in an attempt to fix it. When it reverted it deleted the add-on. Today when I went to find it again, it is not available. Wonder why??? The kicker to all this is that I was watching my computer when the problem happened. It was like someone flipped a switch turning off my Ethernet adapter. I was on the wired connection (Ethernet) and switched to the wireless with no problems...until I tried to check my dead links again. Again the switch flipped off but for my Wireless adapter. RIGHT IN FRONT OF ME! Then I was really dead in the water. The problem was that the Best Western firewall saw my computer checking my bookmarks. The computer checked more than 300 websites within 1 minute and the firewall thought my computer had a virus. Thinking it had a virus the firewall blocked the physical address of my Ethernet adapter (first) and my wireless adapter (second) from further connections. The Fix Start by running cmd from the start menu Type ipconfig /all without the quotes Write down the physical address of which ever connection is/are not working. If you are hard wired to your router, then use the Ethernet adapter physical address. If you are running wireless, then use the Wireless LAN adapter. I had to do this for both. Go to your router's firewall and find the physical addresses of the connections. Find the physical address(s) of your blocked adapter(s) and unblock it. Sorry I can't be more specific for everyone's router but that is the general idea. I'm using Win 7 but I don't think it makes any difference. YOUR problem If you did not do anything unnatural that a firewall might have picked up as a virus, then you might have an actual virus that your outbound firewall blocked.

i was having trouble with the same issue, but nothing worked. then, after two days, i found out, that ESET Smart Security was the problem. two days ago i re-installed win 7 and after the installation the program (ESET Smart Security 4) noted, that there was a problem with the firewall. ofcourse i didn't mind the notice, and thought that Windows' own firewall can do the job while i get this internet connection problem solved. after two frustrating days i was so annoyed of the Smart Security's notice to repair that i did it, and when the computer booted, all my previous connection settings were restored and the computer found my router instantly (even the name), and problem was solved. thought that i should mention it, if someone is as stupid as i can be. :) good luck!

I've had the same problem, and solved it by increasing the number of ip-adresses on the routers DHCP-server (from 1 to 5).That made 7 connect right away :)

Heyy... Walter,I also got the same IP conflict in windows 7 when I switched LAN. I went through the same steps-restarting, turn on/off modem, IP config renew.. and nothing resolved the issue.I have restarted the DHCP client from Services and rebooted the machine and now the issue resolved.

I had networking problems as well. 3 computers running Windows 7. 2 had Adobe CS3 installed which brings with is a piece of software called Bonjour. These two computers had no end of networking problems. 1 was a desktop connected to the router and the other was a laptop connecting via WiFi. Third computer didn't have CS3 and didn't have any trouble at all. In trying to find a solution (nothing seemed to work), I came across the solution shown below in a different thread and thought I would share it. I installed the upgrade for Bonjour (it's listed as Windows Vista 64 software) and all of my network problems cleared up. My thanks to "PDX Prod Mgr". Brilliant! " PDX Prod Mgr I had the same problem when I rebuilt my Windows 7 system. I had CS3 installed on my system, it installs an old version of bonjour. If you inspect your program files\bonjour directory, see if you have an EXE and DLL file dated 2006. Jump over to apple's website and search for windows bonjour. I found the newer download here: http://support.apple.com/downloads/Bonjour_for_Windows Download and install this (you don't have to uninstall the old Bonjour) and reboot. This fixed my install and I no longer have the network error you describe. If you look at that folder now, you will have the newer DLLs (and some other gunk.) "

This may seem simple but having had the exact same problem with the no ip addy error msg ( OS W7 ) and after reading everything on this page I just went into the main settings/control page for my wireless router and added my pc's ip then applied and saved. Fixed it straight away.

how do you get into the main settings of the router without being able to establish any sort of internet connection? i have the exact same problem as is mentioned as the thread title tried everything above, downloaded bonjour to usb, tried that and nothing? please help!!!

it depends on the brand of router you are using, typically you can type 192.168.1.1 into your web address bar to access your router, I know this works for linksys and netgear routers. Some routers are 192.168.2.1 typically these are belkin routers

Hey everyone, I've had this problem for days with my home router on windows7. Try these two commands and restart. it worked for me. Link of Website is below also. 2. Reset WinSock and TCP/IP Stack Open a Command Prompt as administrator: Reset WINSOCK entries: netsh winsock reset catalog Reset TCP/IP stack: netsh int ip reset reset.log Reboot the machine (you can run both commands first, I tend to put multiple commands in notepad and then copy and paste into the command window). http://williamfaulkner.co.uk/2008/07/remove-multiple-preferred-ipv4-addresses-in-vista/

The only way to solve this is to connect a computer with XP on the lan, share the connection from windows 7 to xp, and its fixed, reconnect the both windows 7 computer the home network comes on, then remove the Xp and reconnect the both windows 7 computers and it works ......

I had the same problem and what i did was i checked my DHCP server and saw what MAC address was assigned to that IP address and then double checked the other computer that was having the ip conflict because of the pc that had issues and I replaced the MAC address old the problem pc from my dhcp server and entered in the new mac address of the other computerMic

i got the answer to my problem... found it here http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/2c0af923-24bb-4de2-95a7-9a9d4f64a8b0 hi , i have Disable Bonjour , STOP and reboot. but it still found Unidentified network... please help ~~~

Hi guys! I have had the same problem for a few days now, and have searched numerous forums and gone through hell and high water to fix it. nothing helped until I found the ultimate solution that will help everyone: CALL YOUR ISP, TELL THEM WHAT HAPPENED AND THEY CAN CONFIGURE A NEW IP ADDRESS FOR YOUR CONNECTION. IT ONLY TAKES ABOUT HALF AN HOUR. During this time you must keep your router/modem turned off, and after the ISP has fixed the problem (in my case it took half an hour) you must restart your machine with the router/modem on and connected. From then on it should be like nothing ever happened. Just for the fun of it, here's a list of things I have tried without results: release/renew ipconfig restarting modem/router and computer about a zillion times changing LAN card creating a static IP resetting winsock in command prompt reinstalling Windows 7 reinstalling XP (I had a dual boot and I did both, losing all installations) manually entering IP address disabling/enabling local area connection plugging and unplugging LAN cable uninstalling and reinstalling LAN card driver resetting modem/router using the reset button And after all this, all it took was just a phone call. This is because your ISP is THE ONLY authority when it comes to configuring your IP address. In this case, it can only be done from the outside. this is also the reason why Microsoft didn't announce any patches or fixes for this problem, because it is not their problem and responsibility. Only one question remains, WHY is this happening? Noone has been able to answer this, and I have read tons of forum posts about it. Maybe even the guys that made Windows 7 don't know it. I am going to copy this post on several other forums because I have seen the trouble that people are having with this problem. If you find out why this is happening, please post it here.

I don't have de telephone number, wich number did you call.?

I spent AGES looking for a solution to your problem as I was having the same difficulty. I have now fixed it at last!! This website has the solution that I used: http://www.igeekden.com/2009/08/unidentified-network-windows-7-solved/ It worked perfectly for me. Hope it helps.