I think this started after I reinserted my original purchased Windows XP-home edition disc to reinstall outlook express (which worked by the way). Shortly after this I got a message that I had a certain number of days to activate windows. Now I have to activate everytime I start up. I've activated & registered on line and by the phone but I still have to activate upon every start up. I have been installing all updates including SP2 but that was before this problem arose. Can anybody help???