I just installed windows 8 on my main computer and have lost connection with other computer operating on windows xp

Hi Hershel,

Welcome to the Microsoft Community.

It seems that you are facing issues with networking Windows SP and Windows 8 computer. It would be great if you can answer the following questions:

1.    Do you get any error message? If yes, what is the complete and exact error message?

2.    Are both the computers on the same workgroup?

Method 1:

I would suggest you to refer to the articles and check if it helps:

Wired and wireless network problems

http://windows.microsoft.com/en-US/windows/network-connection-problem-help#network-problems=windows-8&v1h=win8tab1&v2h=win7tab1&v3h=winvistatab1&v4h=winxptab1

Why can’t I connect to a network?

http://windows.microsoft.com/en-US/windows-8/cant-connect-to-a-network

Method 2:

You may refer to the articles and check if it helps:

Why can't I connect to other PCs?

http://windows.microsoft.com/en-US/windows-8/cant-connect-other-pcs

Join or create a workgroup

http://windows.microsoft.com/en-US/windows-8/join-or-create-a-workgroup

Hope this helps. If you have any further issues on the computer, please post your question regarding Windows and we will be happy to help you.