Microsoft Security Essentials :)

360 Security Guard

The way this topic appears to me on forums ('Can someone recommend me a good virus') is a little bit... disturbing, haha.

Anyway, I use Kaspersky Internet Security for years.

I use CommonSense™. Recently updated to the 2013 version as well!

KASPERSKY 2013 go for it, very cheap,very stable,friendly UI

Microsoft Security Essentials is the one I use. Mostly got it because it was required by work (I work from home), but it does a great job. Also Microsoft Windows Defender is good for spyware/malware protection.

Avast is also pretty good and the only one of the free ones other than MSE that I'd use. Avira gave too many false positives, one of which caused a program I paid for to stop working. I put it on the exception list, but every week or so it would still get detected. AVG had a few false negatives, and also was a pain in the butt to uninstall.

Norton and McAfee are crap and wouldn't be worth it even if they were free.

Trend Micro Titanium.

Windows 8

NOD32 is really light and powerfull

Trojan

avast hasnt failed me in 4 years D:

I use avast- free and good for me. I also sometimes use malware tools that are 30 days of trial. And i do not visit porn or other suspicious sites (because my firefox has a lot of blocks (manually added)) - that's what helps me to not reinstall fresh win copies for over a year now

AVG.

Kaspersky

Use Kaspersky Virus Removal Tool, it's a one-time use tool with the latest bases and it's free.

kaspersky 2012 is good and u can download free and find a trial

Microsoft Security Essentials is free and from Microsoft. Pretty decent one. Barely notice it is running.

Avast, Microsoft Security Essentials, MalwareBytes Antimalware, Eset Smart Security
Any one of these gets the job done, and is also low on the performance hit so you won't see much of a difference when gaming :)

I use Avira and MalwareBytes, the paid versions. Last I checked, Avira had the second best detection ratings out of any AV according to http://www.av-comparatives.org/. The only better one (GData) was by a very slight margin, and it's a lot slower than Avira.

Windows Defender

avast! free

PC Tools Spyware DoctorTM

http://www.pctools.com/spyware-doctor/sem/coupon/save25/?utm_source=google&utm_medium=cpc&utm_campaign=spyware_doctor_brand_broad&om_sem_cid=hho_sem_pctools_google_spyware_doctor_brand_broad&ref=google_spyware_doctor_brand_broad&gclid=CKHJqJOt27QCFchX3godXRoA5w

Use Avast or AVG!

I use my brain and I am virus free like for a century, just dont freaking press on every download button and accept every file you get... using google to help you out with downloads... AV scanners are like running through water it takes longer... they scan every shit and slow down your hard drive.
Profit: A free running PC which is fast as shit! without viruses!