Grime Fighter Problems

I have a number of problems with my Avast software:

  1. I have a valud license, but the program prevents me from logging in :frowning:
  2. Grime fighter doesn’t start, or, rather, it starts, but then the screen turns black, no activity whatsoever for > 30 minutes >:(

I am absolutely not happy with this product. Anyone who can help?
(Windows 7 professional, problems: CPU works at 100% whenever I start a browser).

Many thanks! Alexander L

https://forum.avast.com/index.php?board=63.0