After a Windows reset (version 21H2 OS Build 19044.1499), I'm trying to reinstall Kaspersky Total Security.
Kaspersky gives me "base filtering engine is missing".

I have tried everything I could find, including
sfc /scannow,
dism.exe.../restorehealth,
using regedit to set permissions for
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\BFE\Parameters\Policy
as explained in How to Fix Base Filtering Engine Service Startup Problems >> Winhelponline
running the reg file from https://www.tenforums.com/attachments/tutorials/
92365d1469646678-services-restore-default-services-windows-10-a-base_filtering_engine.reg

Runnning "cmd /k sc qc bfe" shows success.

Running 'net start bfe" yields "System error 5 has occurred. Access is denied."

After each 'fix' Kaspersky shows the same 'missing' error.

What should I try next?