I have just reinstalled W7 Home after installing a new motherboard. Only one problem. When I close the PC down and then reboot, I do not get an internet connection. Looking at 'network and sharing centre' in control panel, it shows me as having a Home network and an 'unidentified' public network, which I have certainly not created. If I then select 'change adapter settings' from the menu on the left, and then 'disable this network device' and then re-enable it again, the phantom 'public network' disappears,the internet connection returns, and all is well, until I switch off again, and the pattern is repeated. I have gone through the diagnostics with no results, as well as uninstalling the network adapter and letting Windows reinstall it. Anyone else experienced this, and if so, how is it solved?

bump.

No need to bump, you have not provided any info to work with.Motherboard / network card make / model / firmware.Router make / model / firmware.unbind IP6 from your nic, turn off any power management on the nic.post IPCONFIG /all from the PC

Motherboard Asus P5QL/EPU. I don't have a network card Router Linksys WRT54GS The rest may as well be in Chinese for all it means to me. I apologise for not being an expert; so remiss of me.

I am reasonably competent. I just can't cope with jargon. What's a 'nic' when it's at home?

Forget it. I'd prefer help from somebody less superior.

Best of luck!Bill

Same thing is happening to my wife's notebook. Has nothing to do specifically with any particular hardware, motherboard, nic. This is a fundamental Windows 7 networking behavior that I need to track down too.

I'm certain that it's a W7 problem. I seem to have fixed it for the moment, but I won't start celebrating until the problem hasn't returned for a few days. When I installed W7, it as good as forced me to be in a network called 'workgroup' as I don't recall being prompted to name another network. I immediately changed the name of my local network to that used by my other PCs. It then occurred to me that I'd had difficulties when I first installed W7 on my old motherboard, so I changed it back to 'workgroup' and it seems to be working. After using 'workgroup' on my old motherboard for a few weeks, I again changed it to the name I really wanted, and had no problems until the motherboard died on me. I will experiment again, but it seems totally strange to me that when my network is called 'workgroup' but not with an alternative name. It may turn out to be one of those problems that rights itself without any solution, but it is certainly weird.

Same thing is happening to my wife's notebook. Has nothing to do specifically with any particular hardware, motherboard, nic. This is a fundamental Windows 7 networking behavior that I need to track down too. I believe this may be caused by Adobe's Bonjour.

I don't have Bonjour, or should I say, it's not sneaked onto my PC without my knowledge yet. I know that Google Chrome has been known to affect the smooth running of a PC. When I reinstalled all my programmes last week, Chrome installed itself twice without my permission, and I had to delete it twice, but it was Adobe Photoshop Elements that Chrome was screwing up, and nothing to do with this problem.

I don't have Bonjour, or should I say, it's not sneaked onto my PC without my knowledge yet. I know that Google Chrome has been known to affect the smooth running of a PC. When I reinstalled all my programmes last week, Chrome installed itself twice without my permission, and I had to delete it twice, but it was Adobe Photoshop Elements that Chrome was screwing up, and nothing to do with this problem. Bonjour is installed by other things, perhaps in my case by an older version of Photoshop.

Hi, Please try the following: 1. Boot the system to Safe Mode with networking and see if the issue persists. 2. If this computer is connecting to a router, please also update the router's firmware. 3. Run “inpconfig /all” in a command prompt and check if the IP Address and other network configurations are correct with your network settings. Hope this helps. Thanks. Nicholas Li - MSFT

I have updated my router firmware - no effect. I have unchecked IPv6 on my Network Card - no effect. The network works fine if I start in Safe Mode with Networking. Below is a screen shot of my control panel when the network does not work. The unidentified network portion disappears when it is working. ipconfig /all when not working: Windows IP Configuration Host Name . . . . . . . . . . . . : Peter Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Realtek RTL8168C(P)/8111C(P) Family PCI-E Gigabit Ethernet NIC (NDIS 6.20) Physical Address. . . . . . . . . : 90-E6-BA-77-C4-6E DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::bda5:42c2:3ee9:7d2f%13(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.1.100(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : 09 February 2010 14:56:48 Lease Expires . . . . . . . . . . : 10 February 2010 14:56:46 Default Gateway . . . . . . . . . : 0.0.0.0 192.168.1.1 DHCP Server . . . . . . . . . . . : 192.168.1.1 DHCPv6 IAID . . . . . . . . . . . : 227600058 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-F9-9A-95-90-E6-BA-77-C4-6E DNS Servers . . . . . . . . . . . : 194.168.4.100 194.168.8.100 NetBIOS over Tcpip. . . . . . . . : Enabled Tunnel adapter isatap.{70111511-AEB2-4DCE-A741-8D800CBE64AE}: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft ISATAP Adapter 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. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes ipconfig /all when working: Windows IP Configuration Host Name . . . . . . . . . . . . : Peter Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Realtek RTL8168C(P)/8111C(P) Family PCI-E Gigabit Ethernet NIC (NDIS 6.20) Physical Address. . . . . . . . . : 90-E6-BA-77-C4-6E DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::bda5:42c2:3ee9:7d2f%13(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.1.100(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : 09 February 2010 11:49:07 Lease Expires . . . . . . . . . . : 10 February 2010 11:49:06 Default Gateway . . . . . . . . . : 192.168.1.1 DHCP Server . . . . . . . . . . . : 192.168.1.1 DHCPv6 IAID . . . . . . . . . . . : 227600058 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-F9-9A-95-90-E6-BA-77-C4-6E DNS Servers . . . . . . . . . . . : 194.168.4.100 194.168.8.100 NetBIOS over Tcpip. . . . . . . . : Enabled Tunnel adapter isatap.{70111511-AEB2-4DCE-A741-8D800CBE64AE}: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft ISATAP Adapter Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Tunnel adapter Local Area Connection* 9: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv6 Address. . . . . . . . . . . : 2001:0:5ef5:73bc:e1:993:adde:7f38(Preferred) Link-local IPv6 Address . . . . . : fe80::e1:993:adde:7f38%12(Preferred) Default Gateway . . . . . . . . . : :: NetBIOS over Tcpip. . . . . . . . : Disabled

Hi,The problem is the Default Gateway is some how set to 0.0.0.0 if you can stop the computer set the Default Gateway to 0.0.0.0 it will be OK.Sometime things might not work as we want.Try add one more network card and check it out.Maybe others have better suggestion ?Hope you find the info useful

Having researched a little into Default Gateway 0.0.0.0 I read an article that again mentioned Bonjour. Bonjour is not listed in my programmes in control panel, not is it listed in services . However, on further searching, I found a Bonjour folder with mdsnresponder.exe located therein, which I had read about when reading about problems. I deleted this folder in Windows safe mode, and the problem has not returned, so it appears that this is the answer. Trust Apple to yet again bugger things up for people without their knowledge. I don't even use itunes.

I told you it it may be Bonjour. It may also erronerously register itself as service named "##Id_String1.6844F930_1628_4223_B5CC_5BB94B879762##" and you can confirm it is Bonjour on the properties look for the filename. Sometimes it can also be found under programs/features under its proper name.

Thank you, Daryl and Peter. Bonjour was indeed the culpret. I was having the exact same problem with a phantom unidentified network and no internet access after upgrading to Windows 7. I found these suggestions and searched my Programs, no Bonjour that I could find until I discovered that Adobe installs this print helper thing and so does every Apple program. I took the advice to go to Apple and update Bonsour rather than risk that deleting it would leave "stuff" behind (since I had no options anywhere to actually uninstall it). The existing folder was in my Programs (86) folder but the update was for 64 bit and installed automatically into my Programs folder and also updated what was in my Programs(86) folder so that I now have a listing to uninstall it if I so desire. It has FIXED my phantom unidentified network problem though. This was SO hard to track down because it was intermittent. I imagine it happened only if Bonjour loaded before the network connections loaded at bootup - and load order seems to be somewhat random. Thanks so much for the "fix". I would never have worked it out alone. Marion (Emanjay)