Virus software  

I used Avast. It works fine for me.

I use the Panda antivirus. I find it very easy to use and have never had any problems with my computer in spite of my getting in all these earn online sites, some of which are dangerous.

Have you tried something like McAfee? I believe that they have a number of things to choose from. I always suggest a suite because you get a firewall and spam protection too. They have a free trial so you can see if it is what you need.

I use F-secure.
The best anti virus in my opinion

I use ESET NOD32 and I think its one of the best antiviruses available. The best feature of eset is its simplicity and effectiveness.

I am using Trend and it was recomended by someone at best buy. It seems to be holding up pretty well no pop ups yet!

As many have probably mentioned, Avast works wonders. I've had no problems with it since I've got it. It's on my laptop, my parents desk top, and my partner has it on her laptop! It's wonderful! And not to mention free! lol

AVG - free and perfectly capable.

Work clients tend to use Norton by reputation. Personally i think its rep is crap.

Go to Microsoft.com & try for Free Windows Defender & Malcious Spyware Software. I use McAfee as my Main Spyware Protection, it is Good to have Back Up Software.

I used Kaspersky together w/ my Anti spyware.... If your confuse about choosing the right anti virus here is some pointers....
chooseanti virus that are:
Light in in memory
Efficient and easy to use
and Known One