The easy way:
Download Hitman Pro and run it. After it finishes running all utilities, remove it and download SpyBot search & destroy to keep your system safe.
The hard way:
Got ot Control Panel, Adinistrative Tools and find the Services. Determine each service that is running if it is safe. Stop the ones that should not be running. Then open the regstry, find the corresponding keys and delete them. Then restart your computer. If you do not know what you were doing, it will not restart and you will have to re-install Windows. After doing this, see 'the easy way'.
