Why is it that we require an antivirus in our pc and why only quick heal antivirus?

I have heard a lot about quick heal anti-virus being sold in india, i have not yet tried this software. have used mcafee, norton, but of no use. have tried Quick heal trial edition found very effective. Please advice

Why is it that we require an antivirus in our pc and why only quick heal antivirus?antivirus programs

My rule is simple. If you are on the internet WITHOUT an Anti-virus program, then you HAVE a VIRUS. Be protected, but also, you should LEARN a bit about virus extraction methods.

Good luck and Happy Computing!

Why is it that we require an antivirus in our pc and why only quick heal antivirus?computer protection

antivirus programs are the mainstay these days as there are still "baddies" out there who write malicious code for whatever reason...as far as the specific programs go, some work better in certain regions than others, it has to do with the definition files...Norton is a system hog, but its centrally made for the americas and therefore may not have the correct definitions for the india virus database....mcafee is the same way...grisoft (avg) is a german company and has more definitions because of its international database, not to say norton and mcafee don't, they just aren't as diverse as some others. So your Quick heal program is probably setup more for your region than others and thats why it works better for you.
I would recommend Norton Antivirus with Antispyware and also Spysubract, but at least Norton.