which virus r v talking about jack ? or is it spyware ?
nod32 is a good av. i would suggest u first install/update it and scan ur pc with it in SAFE MODE.
also scan similarly with a good anti-spy like win-defndr or adaware or avg anti-spy.
if it dznt help, then post ur hjt logfile here or at
www.hijackthis.de for analysis. only if u have a rootkit sitting in ur pc, wud an anti-rootkit really help.