WORKGOUP/MSHOME claggup

Hi, I have 2 pc's with XP and a W7 pc.

I can set them all up with the wizard as a network (but W7's sharing system stumps me a bit!) but from time to time, and especially since one of the XP pcs is a new MOBO.CPU, ram and is unstable, I find XP defaults to MSHOME thus I loose file sharing and have to run netork wizard all over again.

I have looked at the "My Computer>Properties>Name...did da and it is set as WORKGROUP but won't I guess stay that way!

Dave. (btw: I do NOT know where the blue highlighting and dots come from!)