Hi, every time someone uses their account on my vista for a long time(several hours), when i switch users to go into my account, the computer slows down. It takes about 30 seconds to switch users, and 10-15 seconds to login, while if nobody has been using the pc it takes about 5.(by "not using" i meant it just stayed on the pick user screen) This happens mostly when a user leaves the computer without getting out of their account, and after some time the computer locks the user account automatically, and after that it's slow for me. The slowness comntinues for some time, like 2-3 minutes, but can be so slow that it takes 20 secs to start IE. I have scanned for viruses, defragged, and used disk cleanup. Any tips to make it faster? Thanks.