Hi again, gpzbc, I'm sorry my previous advice wasn't helpful.
Have you revised the Event Viewer? Maybe the cause of your problem was listed there (revise the System log specially).
Anyhow, I have another idea
. Your problem may be due to the system is unable to end avast services, which may be due to the avast self-protection.
Again, if you want to test it, yo have to go to
Avast settings -> Troubleshooting and check "
Disable avast self-defense module"
Even if it solves your problem, disabling avast self-protection isn't safe, so you should ask for help to locate the conflict which causes the problem and solve it.