Thank you for the info! We do have KB2993651 installed and the problem started around that time. Microsoft says: Known issue 1 After you install this security update, fonts that are installed in a location other than the default fonts directory (%windir%\fonts\) cannot be changed when they are loaded into any active session. Attempts to change, replace, or delete these fonts are blocked, and a "File in use" message is displayed. http://support.microsoft.com/kb/2993651/en-us I have uninstalled the update on a server now. As soon as I am able to restart it and have watched it for a day, I will come back with the results (if any). Regards, Stefan
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