Can’t install windows update

July 31st, 2016

ive had this update on my taskbar for about a week now, but every time i try to install it fails, but leaves the “!” icon on my shut down button, but even after a reboot (several, plus shut downs) it keeps reappearing and failing to install.. and it wont go away.
Its
Security Update for .NET Framework 4 on Windows Xp, Server 2003, Vista, 7, Server 2008 for x64-based Systems.
Published 12/10/2010
Anyone help?
Error Code 643

Answer #1
Get the latest version of Windows Installer

 

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