Lost on NT messages

I?m getting the following message when I try to log off from my server, Message: DfrgNtfs{FED09DB4-4E9A-11D5-8ECD-0008C7911CBF} so I have to end task in order for the system to log me off. I check Technet but I did not find a solution to my problem.
Can you help me, sincerely -Cesar