Blue Screen Error

Lately, my computer slows down after a while. I know that I have a lot of junk on it so I tried to speed it up with "Driver Cure" and "Reg Cure" and optomizing. I have taken off the icons on the start up bar and that also helps.

Sometimes, when I shut down and restart, I get the message "recovering from a blue screen error" which sounds like something really bad.


If my computer keeps recovering from a blue screen error, even after I update drivers and use a registry cleaner, would a new program (and hardware) like Logitech Webcam, or Skype have anything to do with the problem?

Thanks

Teri