Error 2 1 886x590 1 How to fix Windows update error code 643 3

How to fix Windows update error code 643

Some users have stated that they get an error code 643 when they try to install Windows updates. Error code 643 is an update error that occurs more often in Windows 7, 8, and 8.1. Error blocking Windows for updating. Here are some resolutions that might improve the error code 643.


Fixed: Windows 643 Error

  1. Open the problem solver Windows Update
  2. Turn off anti-virus software
  3. Fix Net Framework with Net Framework Repair Tools

Open the problem solver Windows Update.


The problem solvers Windows update fixes a lot of update errors. So, the problem solver might provide a resolution for the 643 error code. You can download the Windows Update problem solver for Win 10, 8, or 7 of this web page. Win 7 and 8 users can click Download Troubleshooter for Windows 7 and Windows 8 to save problem solvers.

Then open the problem-solvers shown directly below from the folder you saved. Click Advanced and select Apply Repair automatically. Then choose Windows update, and press the next button to go through the problem-solving steps.

windows update 643 2 How to fix Windows update error code 643 5

Turn off anti-virus software.


Third-party anti-virus software can contradict Windows updates. Some users have confirmed that deactivating the anti-virus software can improve the error code 643. To temporarily disable the anti-virus utility, right-click the system tray icon and select the Disable option or turn off the context menu. If you cannot find the Disable option on the Anti-Virus Utility context menu, see Through settings in the main software window. Or, you can turn off the anti-virus software through the Task Manager Start-Up tab as follows.

  • Press the Windows + X hotkey button to open the menu shown below.
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  • Select the Task Manager on the menu.
  • Click the Startup tab at the Snapshot below.
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  • Select your anti-virus software and click Disable. It will remove the anti-virus utility from the system startup.
  • Restart Windows and then try the update installation needed.

Fix Net Framework with Net Framework Repair Tools

Error code 643 is often caused by a broken, clean framework installation. You can improve the net framework with the Microsoft Net Framework Tool, which you can download from this web page. Then open the utility window, and click the Term point checkbox I. Press the next button to start the repair utility.

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