WinXP system, trying to install an update from windows update or Microsoft update error or crash

Problem Description WinXP system, using windows update or Microsoft update to check for updates encountered the following problems:
1, Svchost.exe process running Windows Update stopped responding
2, received an access violation error . This access violation error stops the Server service and Workstation service. The error message may be: Window title: svchost.exe - Application error Error content: "0x745f2780" The instruction references the "0x00000070" memory. Memory cannot be "read".
Solution Install the KB927891 patch package.
For more detailed information and patch downloads on this issue, see the Microsoft Knowledge Base:
http://support.microsoft.com/kb/927891/