This is my 3rd day of fighting the bankerfox, win/nuquel virus. I have tried everything! why on 1 account? hlp?

I have downloaded recommended: Dr, Ad Watch, (which I had to uninstall avast) and several others.Even been in safe mode & tried recommendations. It is only on one account. I cannot get online on that account, so I'm using the other to download, copy, then run on effected account. I have now purchased Avast (as I was using a free). this supposedly has more protection? and am running a full scan now. Each time I have ran a scan, its about 8 hrs! I dont know what else to try. Please help!! Thanks, Connie