Windows 7 update issue error code 643


Standard Member
Hi, I don't know if this has been asked before.
I have been getting a windows 7 important update coming up for months, and every time i try to install it fails and say's Error 643.
I've clicked on the help links but to no avail, also in the last few weeks i'm suddenly getting a blue screen then the laptop close's immediately, Is this update causing the issue
Does anyone know how to fix issue.


Below i have pasted the update.

Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008 x86 (KB2468871)
Download size: 18.9 MB
You may need to restart your computer for this update to take effect.
Update type: Recommended
Install this update to resolve issues in Microsoft .NET Framework 4. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
More information:
Update for the .NET Framework 4
Help and Support:
Microsoft Support
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