I have McAfee, the version that updates every other day or so. They notify me and I punch update. It will start out and just hang there. I put it on minimize, at the bottom of the page, and forget it. A few hours later, it shows up again. I go through the same nonsense. Finally, after several hours, it works! Hooray! For a long time it didn't work at all. I made an appointment with their technicians (for a cost of $29.95). I was on the telephone with them for three hours plus (they are in India, by the way). They finally fixed the problems and it loaded and worked. Now, however, I am back to the sometimes yes, sometimes no stage. The Indian technicians said that all the garbage from surfing, all the deleted and wastebasket stuff, etc., was still hanging around and was probably the reason for the trouble. I have just installed McAfee QuickClean (special reduced rate of $19.95) and hope that that will help.