Thanks. You're right-I know little about windows esp. user privileges, but there's a lot wrong.Been fixing some over last couple of weeks and found and deleted some malaware with a couple of other checkers. Avast has trouble deleting some. Can't run boot scan's-tried 4 times. Other scans don't find anything but says files are being used-some of them ended up being malaware. Safe zone really stuffed now-hope the new one is good. I'm hanging out to see it. All my documents were changed to dll file. I deleted all the 2 office programs I own. I can now use 1 and the files are back to document files. I will next install microsoft office. You should be a little kinder to older, more ignorant clients. I've been using it for years and years. That should earn me a little politeness. One day you too will be older and your brain won't work as fast. Believe me it's no fun when you can't keep up with new developments. I've seen it in many generations now. I know the new safe zone program is out soon but I hate not having even the old one working now. It's one of avasts best features. By the way- a lot of other programs won't work for me now. There are 2 new users listed with inherited permissions which stuffs me up. Anyway-I've reinstalled avast twice over the original but I'm going to remove it completely for a full install. Any extra help would be appreciated. Karen.