The other suggestion I have is if you do reinstall Prevx is to put Prevx as an Exclusion in Avast:

  1. Avast GUI > Settings > Exclusions > Add > Browse (find Prevx*) > click OK
  2. Avast Real Time Shields > Expert Settings > Exclusions > Add > Browse (find Prevx*) > click OK
  3. Avast Behavior Shield > Trusted Processes > Add > Browse (find Prevx*) > click OK

Test and see if you are still having problems. If needed, add exclusions for Avast in Prevx:

  1. In Prevx, leave everything at default (if you use SOL you can probably elevate your settings without problems). Add Avast to Prevx Detection Overrides:
  2. Prevx GUI > Settings > Add Override > (add Avast)

I use both programs without problems/conflicts.