The Samsung (Win7) laptop cannot access the RAIN Nimbus (win7) PC. It asks for a name and password that I never gave. The only possible one would be the one to log into any of the computers and that doesn't work.
The Samsung shows the Nimbus in Network and says it is in the Nimbus homegroup but can't access anything. The Nimbus can access public folder on the Samsung though, with no password required.
Then the Vista PC can access the Nimbus, and the Samsung.
The Samsung asks for a password to access the Vista PC.
An today, after starting this post I just double checked things and now the Samsung is accessing the Nimbus without asking for a name and password. This never happens. Could it be because all 3 are on? None of this makes sense. I set all 3 to have the same name and password to log on.