Did you shut down the system and then restart or, did you actually use the Restart option.
If you have fast boot enabled, shutdown and startup never really turns off the system.
Restart on the other hand does.
Nice feature but it will interfere with proper installs of antivirus programs if not done right. I’ve turned it off, not worth saving 30-60 seconds of boot time.
Never, Bob.
Avast made a ugly registry hack: the key HKLM/Software/Policies/Microsoft/Windows Defender – DisableAntiSpyware was never touched by me. The search costed me more tha a day.