Download ccleaner. Set it to delete all temp files for windows and applications. Than close anything that uses your internet. If that doesnt speed things up a bit. Youve most likely got a virus.Get combofix and run it.
"I don't believe in an afterlife, so I don't have to spend my whole life fearing hell, or fearing heaven even more. For whatever the tortures of hell, I think the boredom of heaven would be even worse." - Isaac Asimov