A critical Microsoft patch released last week is causing operational problems for some users, Microsoft has admitted.
The patch, which prevents remote attackers from taking over users’ PCs without any interaction on their part, potentially locks out some users from their PC or prevents them from running some applications, Microsoft said.
The flawed patch is designed to stop attackers using a security hole in the Windows Microsoft Distributed Transaction Coordinator (MSDTC).
Security experts have already warned that exploit code for this security flaw is in circulation.
The trouble with the patch appears to occur only when default permission settings on a Windows directory have been altered.
To resolve any problems caused by the MS05-051 patch, users should restore the default permissions for the Windows folder, said Microsoft.