NIS 2009 Unable to Remove virus ur0.com

Hi

I had this virus or trojan whatever in my computer for a week…I have NIS2009 installed on my PC which is fully updated and i update it on almost daily basis, sometimes hourly…Nw this virus infected every drive of my pc and make them to open in a new window on double clickng (by making a file autorun.inf in every drive)…
NIS2009 does detected it in c: drive and removed it but it didnt detected in other drives so the virus keep coming back…Finally i had to manually remove both these files (ur0.com & autorun.inf) from command prompt by first changing their attributes and then deleting…it also unables the option to see hidden files.
thats all.