Windows Defender Platform update KB4052623 Error 0x80070643

Jacee said:

Read here to see what the error means and how to hopefully fix it: Windows Defender Error 0x80070643 Updating Definitions >> Winhelponline

Thanks but no problem with definition updates, I have issues with platform update

Jacee said:

Maybe this? https://support.microsoft.com/en-us/...lware-platform

Thanks but nothing useful for my case

I just installed 4.18.2001.10 via Windows Update MiniTool. Then, I installed 4.18.2003.8 via VBScript. Both were successful. Give it a go.

Download Windows Update MiniTool.

Juans said:

Tool wureset from wureset.com.

If the following is different from the above, give it a go.
Reset Windows Update in Windows 10

After turning on the computer this morning, the update installed itself without any other action on my part, as happened the past few times. When and if it happens again at the next platform update, I believe I will have to try an In-place Upgrade

I getting real fed up with this "Defender platform update 0x80070643 error" every time ther is an update :-(
I only get the platform updated with the major WIndows 10 updates or when "in place" installing with MediaCreationTool.
All other times the "Defender platform update" comes it fail installing. All other updates install as they should.
Have tried all fixes I found. Downloaded and installed KB manually. User Minitool. Nothing helps.
And there is nothing in any logs or anything to tell WHY it is failing. Only the "0x80070643".
The Defender definitions is updating as they should. But with a several months old platform? Well...