Stupid irritating virus!!!

Ya...if you guys can see my status on facebook a few days ago, I kena a stupid irritating trojan that refuses to be removed despite me downloading an array of removals...apparently, my armoury not enough to keep out the stupid trojan...Zonealarm + AVG...

In the end, I gave up lor...rather than spend time removing it, I decided to reformat my C drive leaving my D drive intact. After the reformat, I tried to do Windows Update but to my horror...the trojan still there or maybe infect my PC again when it is most vulnerable. So...reformat again...so far now still ok...crossing my fingers...Now I KS liao...AVG + Spybot + Zonealarm...damn the trojan!!!