Just because you cant hear it doesnt mean it is off.
If I was you I would go to "start" then "run", and type in msconfig. Once that opens go to the last tab "startup".
In there is some check boxes, all the ones checked start up automatically when you turn on your computer. The more you have on the slower your computer boots, and all those eat up your system resources. You do not need all of them running.
There is some you have to have check marked, but yahoo messnger, or any messenger you can turn off, kodak, actually anything that is an extra software. Once you uncheck the boxes it will want to restart. Click yes.
You will find that your computer will start and run much faster. When you want to use the programs you unclicked, there is usually a short cut on your desktop, or look in "start" "programs" and then select desired one.
Hope this helps a tiny bit.