Windows 10: How to fix Windows Update Error Code 643 when updating .NET Framework

It’s always suggested to update your Windows 10 OS regularly so that you can keep operating your computer in a smooth and impeccable way. But […]

This article How to fix Windows Update Error Code 643 when updating .NET Framework first appeared on TheWindowsClub.com.

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.net framework 3.5 sp1 not installing

What's the error code in Windows Update (Review your update history)? E.g. 800706BA, 8024000B, or 643

...except 1.1 (VS2003 and VS2002).

 

KB 4033342 failed - Error Code 643 Windows Update encountered an unknown error

I have gotten the Code 643 Windows Update encountered an unknown error message multiple times while trying to install Important Update KB 4033342 Microsoft .NET Framework 4.7.1 for Windows 7 and Windows Server 2008 R2 for x64. Microsoft .NET Framework
4.5.1 is currently installed on my Dell PC. How can I get the update to install? I have restarted and retried to install the update numerous times. All other updates are installing fine.

 

windows update error 643

Hello Karen,



You can run into the Windows Update error code 643 due to software conflicts, malware infection, registry issues, and corrupted files. To isolate the issue,
kindly provide us these details:

• Have you made any changes on your computer prior to the issue?
• What specific updates are failing?
• Do you have an antivirus or any security software installed on your computer?

As an initial troubleshooting, kindly follow the steps on this
article to Fix Windows Update issues.



Feel free to post back should you need further assistance.