Brief outline of my setup:
wireless router + separate adsl modem
1 x XP Pro desktop (wireless connection to router via usb wireless adapter)
1 x Vista home premium notebook (wireless connection to router via built-in wireless)

A number of shared folders on each pc + a shared printer connected to the desktop all used to work fine but for some unknown reason stopped working. I can no longer "see" either pc from the other pc and therefore am unable to access any shared folders or devices. Wireless setup appears fine as each pc can access the router & internet ok.

I haven't changed any network settings on either as far as I can remember but I did add some additional users to the XP pc around the time the problem started so I guess that may have something to do with it but I really don't know what to do/try to fix things.

I'm hoping someone around here with a little more know how might be able help get things going again. Thanks for any suggestions folks.