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May 15, 2007 (Computerworld) -- On small office and home office networks, Windows XP and Windows Vista cooperate about as well as cats and dogs. But you can teach them to get along.
When you combine Windows XP and Windows Vista PCs on the same peer-to-peer network, such as you might have at home or a small office, you may run into all kinds of problems. It may be difficult for your Windows Vista PCs to find your Windows XP PCs, and vice versa.
And the Windows Vista Network Map -- which may be the best networking feature Microsoft has ever introduced into Windows -- won't work properly with XP PCs. They won't show up properly on the network map, if they even show up at all.
Fixing workgroup woes
The first problem is that the default name for your workgroup on the network has been changed from Windows XP to Windows Vista. In Windows XP, the default name for the network is Mshome; in Windows Vista, it is Workgroup.
The fix for this problem is easy; you can change the name of the workgroup on Windows XP to match the name of your Windows Vista network. On Windows XP, right-click My Computer, click the Computer Name tab, then click Change. The screen shown nearby appears. In the Workgroup box, type in the name of your Windows Vista network name. If you're leaving it as the default used in Windows Vista, type in Workgroup. If you're not using the Windows Vista default, change it to whatever name you've given your Windows Vista network and click OK.
Changing the name of your workgroup in Windows XP (Click image to see larger view) After you click OK, you'll see the confirmation dialog shown in the figure below. Click OK again, then restart your PC.
Success -- you've changed your workgroup