Okay, well, I tried to load my computer in safe mode with networking to see what the blue screen error was, and it actually loaded. So I downloaded the Avast uninstall tool and ran it. Then I rebooted my computer again and it rebooted just fine, it (knock on wood) seems to be working okay for now.
Do you know what the problem could be though? I'm honestly thinking about switching to AVG. I really do like Avast, but this is the second time this has happened.