I’ve been using avast antivirus for about 3 or 4 years now. Always the free version and in that time I have had many virus attacks but no infections except one attack 6 to 12 months ago that entered through my updating Java. Avast asked if I wanted to Sandbox it, and I declined. Result, trashed windows 7. I am yet to pay a dollar for this fine product and have installed it on the PC’s of several friends and family members. I can’t recommend Avast version 4; 5 and/or 6 as other than excellent, stable, effective and up to date antivirus. I haven’t installed version 7 but hope too soon. Kudos.
Why haven’t you installed v7 yet?