Which virus protection software should i get?

Which would make my computer run faster, not slow like Norton.

1.AVG

2.K7 COMPUTING

3.Mc Afee

4.CA

5.F Secure

6.Kaspersky

7.Windows Live OneCare

Or any other programs that are free! :) Thanks everyone.

Which virus protection software should i get?antispam

1) Spybot Search %26 Destroy http://www.safer-networking.org/en/index...

2) Windows Defender - http://www.microsoft.com/athome/security...

3) Lavasoft Adware - http://www.lavasoftusa.com/products/ad_a...

4) Clamwin Antivirus - http://www.clamwin.com/

5) Fsecure Black Light - http://www.f-secure.com/blacklight/

Which virus protection software should i get?avast

I love Norton Antivirus they even have there own firewall and are cheap just like $30 and that last you a hole year.
avg
AVG Free

can't beat the 98.1% detection rate
AVG hands down, I have ever had it task any virtual memory, ever. I so can't say the same for any other program.
There's no anti-virus software can helps to make your machine runs faster yet. You can get an anti-virus software that you can run without affecting computer stability.

If you do not want to affect your system performance, i would recommend AVG and CA as they run with really low memory usage. Kaspersky is good on protecting your machine and it slows down a little bit only, not as Norton. (I used before Norton and found it terrible.)