Problem after update

Hi EricYL.

Thanks for your reply. In your description, in your last clean boot, all your accounts could be opened while the main account had a black screen.

Please provide us a screenshot or take a photo of the page with the black screen so that we can determine the problem for you.

Then we think this may be caused by some third-party software, please disable or uninstall the third-party security software you are using on your computer temporarily, and then check the status of the main account.

Disclaimer: Temporarily turn off antivirus protection. However, keep in mind that if you do so, your device may be vulnerable to threats. So please turn it on immediately once issue fixed. 

Meanwhile, please try to use the administrator account that has the problem before, and open some common software one by one in a clean startup state, and check which software has the problem after you open it.

Thank you for your understanding and support. 

Best regards,

Zev - MSFT | Microsoft Community Support Specialist

When I last did a clean boot, I could run all accounts. Now this one has that recurrent rotating stuff.

When logging to the main one, black screen, but at least it has something valuable: File history is working, so I have automatic backup of the few files I am still using.

Hi EricYL.

Thanks for your reply. In your reply, I understand that the other accounts seem to recover after you enter safe mode, but your main account still has the problem and it automatically opens WWAHost.exe.

We judge that this may be some of your common software automatically enable WWAHost.exe. please, in your other account, go into safe mode and perform a clean boot, then switch to your main account and check again if the problem exists.

Thank you for your understanding and support.

Best regards,

Zev - MSFT | Microsoft Community Support Specialist

Main account still has the same problem. Switched user, ended WWA Host task, went back to main account, same problem and WWA Host running again.

Hi Zev

Restarted in safe mode, all accounts working. Restarted then normally.

My account is now working, going to check the other ones.

EricYL