Windows update fails with error code 0x643

Anonymous

I have downloaded the recent Microsoft updates and all but one installed successfully. The failing update was: Microsoft .NET Framework 1.1 Service Pack 1 Security Update for Windows 2000, Windows XP, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 (KB953297);

with an error code of 0x643.

We tried several times to install it and it keeps failing. It was originally the 3rd update in the list to install. After failing the first time, it was the only one we were trying to install. We tried it after the restart required for the other updates.

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