This may happen if the update isn’t installed correctly the first time, or if your Windows Update settings can't detect the update.
If you keep seeing the same update being offered for installation, try to install the update at a later time.
If after installation you see the update being offered again, post your issue to the Microsoft Communities for resolution about this specific update. To post to the Microsoft Communities, visit: http://answers.microsoft.com/en-us/windows/forum/windows_update
If the information in this article did not help, select one of the following references:
Error codes “0x80070643” or “0x643” occur when you install the .NET Framework updates
Article ID: 910339 - Last Review: April 8, 2013 - Revision: 18.0
- Microsoft Update
- Microsoft Windows Update
- Windows Defender
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