are there any free good quality anti virus software? ?

Avira offer a free antivirus that works really well so do Avast,
if it is free software you want I have a thread on the darksiderg that has links to hundreds of free (as in free beer) applications for you to download.

http://213.155.27.24/forums/index.php?showtopic=90933&st=0&start=0

pete
July 2012

free.avg.com
(much beter than Norton that you need to pay for)

You also have avast.

Microsoft Security Essentials is also an option.

If you search a little, you can find several other that are also free.

Stay well away from anything that offers a free scan but ask you to pay to remove the detected treats. Those are false, or rogue, antivirus that are usualy trojans or scarewares.

Electro
April 2011

Free software from microsoft called Microsoft Security Essentials (MSE ) is safe and easy to download . AVG is another free download opting for the basic version.

The boy from Ballbrigan
April 2011

Microsoft Security Essentials from Microsoft website. It's a lot better than you think, and free. Un-install currently installed anti-virus program(s). The "(s)" may also indicate conflicts that are causing your problems in the first place. Also add Malwarebytes (free too) for removing the other stuff you tend to get yourself into, and set both up on update /scan schedules...good luck!

Steveingsp
March 2011

AVG = popular & good

List here...

http://en.wikipedia.org/wiki/List_of_antivirus_software

Peccavi
March 2011

avg.com

p
March 2011