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0x80070643 in Windows 11: How to Fix This Fatal Error

The Windows Update troubleshooter should be your first call

6 min. read

Updated onMarch 28, 2024

updated onMarch 28, 2024

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Key notes

Microsoft might have recently released Windows 11, but some things never change regarding updating errors. Users have already posted about the update error 0x80070643 in Windows 11 on the forums.

The error has been passed down from the previous Microsoft OS. This article examines the error and its causes and gives you the most reliable resolutions available for Windows 11 users.

Note that this error arises for some users when installing new patch updates via Settings. It is a Windows update error. And simply signifies that there have been issues with your update process.

What causes 0x80070643 error in Windows 11?

Before trying to get rid of the update error 0x80070643, it’s worth considering the more likely causes of the issue:

To solve the error 0x80070643 in Windows 11, you must apply resolutions that feasibly remedy those causes. Give these potential fixes a try right away.

How do I fix the install error – 0x80070643 in Windows 11?

1. Run the Windows Update troubleshooter

2. Run a system file scan

The SFC scan is a fast and effective way to identify system errors that may cause issues during Windows 11 installation. You can run this scan by following the steps below.

First, bring up the search utility by clicking themagnifying glassbutton for that tool.

2.Next, type the keywordcmdin the search box to findCommand Prompt.

Click theCommand Prompt’sRun as administratoroption on the right side of the search tool.
Input this system file scan command and pressEnter:sfc /scannow
Thereafter, wait for the system file scan to reach the 100 percent mark and display its outcome in theCommand Prompt.

If you need to fix this Windows issue automatically, we advise using anautomated repair toolto comprehensively detect corrupted system files.

3. Install the latest .Net Framework 4.8

4. Repair .NET Framework

5. Temporarily turn off third-party antivirus software

Disable any third-party antivirus utility installed on your PC before you try installing the latest Windows updates inSettings.

6. Change the SoftwareDistribution subfolder name

7. Reset the Catroot2 folder

8. Update Windows Defender’s signatures

We can’t promise that the above fixes are 100 percent guaranteed. If they’re not enough,resetting Windows 11might also be worth a shot.

Some third-party repair utilities can also fix many Windows update issues, such as error 0x80070643. Thesebest Windows update repair toolsare worthy of your attention as well. As for other errors, we also coverederror code 801c03ed, so you might want to check it out.

In the comments below, let us know your opinion on the Windows 11 install error – 0x80070643.

0x80070643 in Windows 11: How to Fix This Fatal Error#

How do I fix the install error – 0x80070643 in Windows 11?#

1. Run the Windows Update troubleshooter#

2. Run a system file scan#

3. Install the latest .Net Framework 4.8#

4. Repair .NET Framework#

5. Temporarily turn off third-party antivirus software#

6. Change the SoftwareDistribution subfolder name#

7. Reset the Catroot2 folder#

8. Update Windows Defender’s signatures#