We have recently upgraded a network PC to windows vista from windows xp but we have maintained networking on the local domain. The problem is that only administrator are able to can log onto the PC and other users are not. They get an error message saying "The user profile service failed the logon". Other users can see services running in MMC and network is active on PC as well. We are not able to make out if there is something wrong with the network or there is something wrong with windows vista. Hope someone over here will be able to help me out, thanks in advance for any help.