I hired 2 computer savvy kids to set up a desk computer (2007-Vista) & a laptop (2011-Windows 7) for me. Lately the desk computer has been running very slow. Sometimes freezing. It seems to do it when Windows Defender is running. So I go into Defender & stop a scan ... Sincere thanks, Norton, for all you do for us. But I keep getting Norton Performance Alerts. One recent one: the RAM was low. So one of the computer kids had me buy (& he installed) new RAM sticks. A manager at Best Buy told me Norton takes up a lot of space. Norton seems to run scans every minute. Can someone send me simple instructions so that Norton will only scan when I want it to? ... I hardly ever go to weird web sites & I do pretty simple things on the computer. So I don't think I need Norton scanning every minute. Thank you.