I am having a hard time figuring out what software to use. Can someone please suggest a really good anti-virus software for PC please? Thank you

I use Avast! Antivirus. It's completely free, and it's never let me down:

http://www.avast.com/

Hope this helps. :)

Ahh I just had that hehe. I have Bitdefender 9 pro now. Its seems to be good. It has the highest rateing at pcworld. Check it out at http://www.bitdefender.com/ thanks a lot for your info.