I have been having this problem for about a week. Someone has been changing my passwords for hotmail and facebook. The first time it happened I brushed it off and started making a new account but 1 hour after making a new account it happened again someone had signed into my msn while i was on then changed the passwords. I rebooted my computer and it stopped for a couple of day but then it happened again. I can't keep making new accounts. I'm running windows vista with mcafee security center. I also have a dlink wireless router that is used by my sister. I really need help please anything would be helpful.