Windows 10: Antivirus and Start Menu don't work 0x80070643

I had noticed that my Dell laptop over the last few days, whenever the screen was locked, was repeatedly disconnecting and reconnecting to the external monitor. Every time when I subsequently unlocked Windows, I found that it had annoyingly moved all my windows from the external monitor to the laptop's screen. I remember that a graphics card driver had prompted me for an installation a couple of weeks ago, which must have caused the disconnection/reconnection problem with the external monitor. So I then did a System Restore back to around three weeks ago. This cured the problem.



Because I had rolled back three weeks, I then did all the recent Windows Updates, including KB4580364 Optional Quality update: 2020-10 cumulative update preview for Windows 10 version 20H2 for x64 based systems which had not been installed previously. This update changed the look and feel of the Start Menu icons.



But I then noticed a new problem - Windows Defender had failed to update its virus definitions - "There were some problems installing updates, but we’ll try again later. If you keep seeing this and want to search the web or contact support for information, this may help: 0x80070643".



I therefore undid the System Restore, which didn't cure 0x80070643. Even worse, my Start Menu stopped working, only for my own user, but not for a new test user that I created. I assume that this was because KB4580364 had updated some of my user data for the Start Menu, and this new user data is now incompatible with the previous configuration when I rolled back KB4580364. I now cannot do any effective System Restore.



How can I fix 0x80070643 and restore my Start Menu?

:)

 

WarRock 3D Detection don´t works

Hello Guys,

i had a problem with my Card. The card didn´t wanted to change in 3D Modus. Ok now i removed the other 2 Pins and now it runs in 3D Modus in 3DMark06 too. The Card is a HD 2900GT. But my Game WarRock don´t runs in 3D Modus. Is there a List where i can start the game in 3D Manual? Because in Automatic it don´t want start because the Card don´t see that it is an 3D Game. Can someone help me?

 

windows 10 start menu doesn´t work

Hi

I returned to my own old microsoft account because of reason I descriebed before.

I run Microsoft Safety Scanner, didn`t find any spyware or viruses. This issue didn`t help me to solve the start menu problem.

I use norton as antivirus software. I tried disableing it, but also didn`t help. Only helped me unninstaling drop box programme. The start menu has been working until than, but with very limmeted functions. Don`t recieve error mesage.
The microsoft store app program is not shown up. Microsoft Mail programme don`t work, have to use webmail. I tried again attempt reinstall apps via powershell, but without any success. I use Microsoft account.

Thanks.

Anton

 

stuff that don`t work

I also tryed safe mode, it still didn`t work on it. and Glucofacts Deluxe STILL does not work, so... you say that you don`t know how it started working on win 10 for you?