A relatively easy problem to solve
How to Fix Windows Update Error 0x80070643 on Windows 10
Do you keep getting error 0x80070643 while trying to update Windows? It’s an annoying problem that persists no matter how many times you try to retry an update. We’ll show you how to fix error code 0x80070643.
Windows Update may occasionally display error code 0x80070643 while updating system components such as Windows Defender and Microsoft .NET Framework to the latest versions. In rare cases, it may also appear while installing qualitative and cumulative Windows system updates.
Error 0x80070643 can appear due to several reasons. For example, it could be due to a buggy instance of the Windows Update service or a corrupt .NET Framework installation. Follow the instructions below to troubleshoot and fix Windows Update error code 0x80070643 in Windows 10 and 11.