Firstly remove it through Add/Remove Programs in Control Panel then start again (although it sounds like you have already done this).
Secondly, how long ago did you install it? If you're running XP do a System Restore do a System Restore to before you installed it and then try again (go to Help and Support, search for 'run System Restore Wizard', click on the link and follow the instructions).
If you're running 2000, you may be able to run System File Checker to find and replace any dodgy dll's. This is Start - Run - cmd, then type sfc, then type /scannow - this will find and replace any incorrect dlls. Or at least it should. I think.
Dolphins make you feel better about your duffel coat wearing, cous-cous eating, 'we-smoke-weed-cos-daddy-says-we-shouldn't', sad little spooner of a life!