Hi Ruud,

Just noticed your reply. The error in the vent log is:

Failed to resolve SID(s) Error : The trust relationship between this workstation and the primary domain failed. (0x6fd/1789)

I'm running W7 RTM x86 and our AD is Windows 2000 based. The PC works fine with exchange, file shares and all other domain functions so I'm not aware of how it could be a PC issue.

Any help greatly appreciated.

Note:
I've checked the Default Domain Controller Policy and the default groups have access this computer from the network rights:

Administrators
Authenticated Users
Everyone

As per KB262958