Recently, I have been experiencing pop up ads that come up after I open IE even though the Pop-up Blocker is enabled. As I browse, more and more of these pop up windows will come up with different type of ads. Just today, my computer refused to boot up and continues to circulate to the page where you choose to start up in Safe Mode, Safe Mode with Networking, etc...It would not start up normally, and it would not revert back to that last good start up, Safe Mode with Networking also did not work. I finally picked Safe Mode, and chose a restore point date before these pop up ads started. When I opened IE, the automatic pop up once again presented itself. The computer also wouldn't shutdown properly and had to force it off. I'm not sure if this computer will boot up next time. Please help!!!