What is making my internet and computer slow?

JJBRO#1 asked:


When i first got my computer in 05 it was really fast, and now its not as fast and almost kind of slow. When i first got my high speed internet connection it would load sites and videos in the blink of an eye. Now it takes some time to load anything and flash videos take forever now. I have anti virus and anti spyware and i am not yielding any thing out of the ordinary. What could be the problem? Is this some kind of sign that my computer is getting old? Is this supposed to happen?