Have the avast Premier 2014.
It is rubbish, I am have more problems than it's worth.
Uses up vast amount of ram, crashes Win 7, Re-aligns Icons & looks Friggin awful.
The 2013 version worked wonderfully, silently in the backround.
This monster is utter crap.
I have 6gbs of ram, Win 7 Premium, 64-bit operating system.
Which grinds every thing to a slow grinding halt.