I find that Avast slows down my bootup considerably as well. I can live with this, as at least I can do a few things as it’s the network connection that takes the longest to come online so I do have access to files etc within a few minutes. The big problem I’m having is that whenever Avast requires a major update, the computer takes ages - up to 20 minutes, to become fully operational. The avast icon doesn’t appear in the lower right and the disk churns. It’s using the ‘system’ process, so it took me a while to work out it’s avast causing the problems. I will uninstall and reinstall. I don’t have too much to complain about as I use the free version but I am going to look for alternatives as this has happened a few times now and two of the times I’ve really needed access. I am writing this on a laptop, whilst my main desktop is churning away.