Prøv at tage et kig på den her
http://support.microsoft.com/kb/923100/Der er vist generalt problemer med .net patching, i MS10-041 er er der fejl i patchen fra Microsoft
Revisions
• V1.0 (June 8, 2010): Bulletin published.
• V1.1 (June 16, 2010): Corrected the registry key verification for Microsoft .NET Framework 2.0 Service Pack 2.
• V1.2 (June 22, 2010): Revised this bulletin to announce a detection logic change to fix a Microsoft Baseline Security Analyzer (MBSA) issue with Microsoft .NET Framework 3.5. This is a detection change only that does not affect the files contained in the initial update. Customers who have successfully updated their systems do not need to reinstall this update.