Press your Start Button (bottom left) and go to "run"
now type in: msconfig
now you will get a box that pops up and will tell you bunch of stuff dont mess with anything else other than what I tell you otherwise you could do something really bad (possible) go to your "startup" tab on the top right of the screen where it usually is and click it.
Now you will have a closed in box with bunch of filenames n addresses and more boxes with checks in them. Now if your like me you dont want anything starting up when you start you computer up or while your even doing anything cause it slows you down. Now unless your like me right now 1 have 1 thing starting up when my computer starts up and thats my settings for my overclocked graphic card. But other than that uncheck every box and then hit apply and ok. Then restart or wait till later to restart.