Hi there. I’m on a W7 64 bit machine, and Avast 8 works great. I’m an average computer user with basic knowledge, maybe a step up from a n00b :slight_smile: I installed over 7 and haven’t done anything else with Avast. It just does its job. Sorry you’re having issues with it. There are many knowledgable people in this forum who may be able to help if you provide more details, as bob suggested.