Everything was working fine (using RTM) for about a week... I find today that my Homegroup was not working. Further investigation finds that "Peer Name Resolution Protocol" will not start, seemingly causing the problem. It gives some error that no Bing or Google search find ANYTHING for. Even MS support gives nothing. Nice going MS superstars... lotta good an error code that cannot be looked up is! Does anyone have a fix for this?

I tried a repair/upgrade... did not fix the problem. I had to install clean. I had nothing installed on Win7 except MS Security Essentials. I was using it as a media center. here's the error in case someone at MS decides to do the right thing and fix this... Services --------------------------- Windows could not start the Peer Name Resolution Protocol service on Local Computer. Error 0x80630801: 0x80630801

Hi, Does the issue persist after doing a clean installation of Windows 7? If the issue persists, I suggest we perform the suggestions from the link below: Home Group Issues Thanks, Novak

From an elevated CMD prompt.Net stop p2pimsvc /yThen delete the following file. "C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking\idstore.sst"reboot and you should be able to rejoin the homegroup.-- This posting is provided "AS IS" with no warranties, and confers no rights

Wish I would have had this info 11 days before you posted it... Win7 is still very buggy. :( Brian, maybe you can put that in a KB so people can find the info when needed?

Thanks it worked for me today.

Will you please tell me in laymans terms exactly what I should do step by step.Please make it easy to understand,for example when you say from an elevated CMD promt What do you mean?Also how do I delete the File you say to delete.Once again please explain so I can follow step by step. Thank You so much Paul Nap

Will you please explain to me how to do the CMD prompt and then how to delete file C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking\idstore.sst I need you to explain it to me step by step how to delete the file Thank You Napa21

1) Start Menu, Programs, Accessories, right click on Command Prompt and select run as Administrator 2) Start Menu, Programs, Accessories, Windows Explorer, Copy and Paste this C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking\ into the task bar at the top and you will see the file. Highlight it and press delete. Google of course could easily sort this out for you too!

1) Start Menu, Programs, Accessories, right click on Command Prompt and select run as Administrator 2) Start Menu, Programs, Accessories, Windows Explorer, Copy and Paste this C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking\ into the task bar at the top and you will see the file. Highlight it and press delete. Google of course could easily sort this out for you too! I did this and I got this message Windows can`t find C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking\ check spelling and try againPaul Napolitano