Maybe by starting to give us some more details?
In which context does this error occur?
On the client, or on the Terminal Server?
In a TS session, or on the console?
Exactly *when* does it occur?
Is there any error message text?
Which OS and SP do you run on the client and the TS?
Is this a system error, an application error, or an EventID?
Have you checked if there are any Events that give more info?
