Windows Update could not be installed with Error 0x80070643

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The update KB4048955 for Windows 10 brought some quality improvements and other elements that claimed to close the security holes. However, an error 0x80070643 caused each time users tried to install the update. Error 0x80070643 is a general Windows Update installation error code that may appear on your computer screen during installation.

Windows Update Error 0x80070643

Here’s what you can do to fix the problem.

Rename the SoftwareDistribution folder

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An error 0x80070643 may prevent you from installing a Windows update or other software. This problem may occur due to corruption of the MSI software update registry or if the.NET Framework installation on the computer is corrupted.

To solve this problem, it is recommended to rename the SoftwareDistribution folder. To rename the Software Distribution folder, open a raised input window, type the following commands one by one and press Enter :

0x80070643net stop wuauserv0x80070643 0x80070643net stop bits0x80070643 0x80070643net stop bits0x80070643 0x80070643net rename to c:windowsSoftwareDistribution SoftwareDistribution.bak0x80070643 0x80070643netto start wuauserv0x80070643 0x80070643netto start bits0x80070643

Now delete the contents of the Catroot2 folder.

Delete the contents of the Catroot2 folder

Catroot and Catroot2 are some of the important Windows operating system folders required when updating Windows. So, if you encounter the problem when updating Windows and receive an error message – 0x80070643, reset the Catroot2 folder.

To reset the catroot2 folder, do so:

Open a high command prompt, type the following command in order and press Enter :

0x80070643net stop cryptsvc0x80070643 0x80070643md %systemroot%system32catroot2.old0x80070643 0x80070643xcopy %systemroot%system32catroot2%systemroot2%systemroot%system32catroot%32catroot2. old /s0x80070643

Then delete all contents of the catroot2 folder

After doing this, type the following in the CMD windows and press Enter :

0x80070643net start cryptsvc0x80070643

Your Catroot folder will be reset when you restart Windows Update.

Run Windows Update troubleshooting

Occasionally, when Windows users attempt to install the latest Windows Update updates, they sometimes receive an error message – 0x80070643. Windows Update Troubleshooter fixes many of these errors, so run it and check.

It is a good idea to install Windows updates in the proper boot state, since not all non-Microsoft processes and services start in this state and therefore there can be no third-party interference that could cause Windows Update to fail.

Best wishes!

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