OT viruses and spyware

Hi all, just a note. I have a fairly new computer and have Norton anti-virus. I figured things were covered. This morning when I tried to get online, my computer had a spaz attack!!. I found a couple of things recommended by Microsoft and am passing them on. I downloaded them both (FREE!!) and between the two things they found over 400 things that were infected!!! One is www.grisoft.com look for the free download and the other is thru www.majorgeeks.com Adaware 6.0 Please let me know if you have questions. Elizabeth