AAAAArrrghh! Trojan attack!

I seem to have contrapped spysherrif - a trojan disguised as a spyware-scanner. This little sucker makes my PC soooo slow, and I don't even know how to start cleaning this mess up! I did a search on the web, but I don't know any of the forums that give advice, so I'm a bit biased! Does anyone have experience in removing this invader?
I really must crack up my protection soon!

Cheers,
Omag
I really must crack up my protection soon!

Cheers,
Omag