What is the best firewall software?

and can you use kaspersky anti virus 6.0 vista on xp

What is the best firewall software?network

That's an easy one, Zonealarm. Of course my answer is biased but if I wasn't, there would be nothing to choose from.

What is the best firewall software?norton

the microsoft system that is only $40 per year and is truly exceptional. i have had them all from panda to norton etc. computer associates are the next best i had settled on until i signed up for windows live onecare. it keeps it clean.
Put File Hippo in your search and click on them.You can then

read and find the best for you.I like Sunbelt Kerio Personal as

i'm on wireless and it suits.Check it out.
Norton 7.0
Zonealarm. Not the new one for vista the one for xp
ok here's a great section of firewall.

http://majorgeeks.com/downloads34.html

Safe Site

Here is another one

http://filehippo.com/software/firewalls/

Safe Site
Comodo:

http://www.personalfirewall.comodo.com/
www.avast.com works on its own, never pops up with annoying questions and works very very well.