Why does my computer slow down after 30-60 minutes of use? Typing on twitter takes several seconds to show on?

[080]

1.sounds like you have spyware, and/or viruses.
2..you may have many things starting up and that can slow down your pc.
3.Just because you click the x to close out the program icon near your clock it does not stop the program from running in the background.
4. You may have 5, 10, 20 starting up at the bottom right of your screen near your clock that can slow your pc down as well. if that's the case you need to uncheck the program in your start-up section.

The only thing that should start up and show near your pc is your antivirus.

I hope his helped.