[Morageort]

MB is fine. It is just an anti spyware so it will not conflict with Avast

And yes avoiding registry cleaners is a good idea. They do not always know what to remove and can crash a computer

If you still have problems and want a reference where to go online let me know. I am a member of a good tech site and they might have some luck. You could run HiJack This and that might show something. Just don't try to correct anything on your own. The scan won't do anything but if you try to remove anything it can cause a crash if you mess it up