magpienja,
I'll cut to the point.
Reformat your computer and start afresh.
In these days of viruses incorporating spyware which provides nasties such as keylogger and backdoor capability, it's really not worth the risk. The creators are also getting much better at hiding their malware in obscure ways. The creators are also getting better at deploying anti-virus countermeasures.
This is even more relevant in cases such as yours, where despite attempts at fixing things with anti-virus/anti-spyware, there still seems to be "something wrong".
Sure, if you're a very experienced user, you can have a go at poking about in the registry, process list and other places. But the average home computer user doesn't know what they are looking for, even with "experts" hinting at what they should look for.
If in doubt, reformat.
P.S. Additionaly, I would respectfully suggest take your infected computer off the internet right now. If your virus is part of a botnet, you are probably spewing out tons of spam or being used for other purposes.