Welcome to the Avast Forum x0pht

I am sorry about your issues. I am just another member trying to help other members here. Sometimes my answers are helpful and at times they are not, I am sorry.

How to Stop Slow Startup (Boot) with avast! Antivirus

This guide should tell you how to increase your system (Windows) performance and startup time with avast! antivirus.

http://www.getavast.net/stop-slow-startup-boot

If the above is not correct or does not help you, I am sorry to have bothered you