If you need assistance removing SH3, then you are probably right, the game is probably not for you...
It should remove cleanly with add/remove programs. If not then just delete the silent hunter 3 directory from program files. Your save games live in a directory under my documents.
You should also remove the starforce driver from your system, using the app here
http://www.onlinesecurity-on.com/protect.phtml?c=55