Sometimes in Windows 7 it may happen for some reason (like accidentally delete a user profile) that a user starts to login with a temporary profile.
If this happens, you may follow this steps to resolve the issue:
- Logon to the machine with the issue with an administrative account
- Open the registry editor (start –> run –> regedit)
- Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
- Under the ProfileList subkey, search for a SID that end with .bak
Now just restart the machine and everything should be fine.