You are not completely right. I had this issue with “critical error” many many times on W10 with Avast. After a few weeks I decided to clean reinstall W10 on my PC, installed Avast, 3-4 days passed and bam, critical error was here again. So I reinstalled W10 again, this time with another AV program (so NO safe mode reboot) and you know what? Errors are gone! I’m not saying that Avast is the cause of these issues, it rather looks like some other AV’s just behaves the way that prevents W10 to fall into erroneous state, like boot slowdown etc…