Best programs to keep your machine malware free?

Trojans and bots seem to be big problems and poker sites are not all that clean. What do you use to keep your machine running without problems?

trolling for ten posts are we?

in case this is a serious question and not just a spammer bulking up the post count.

Bots are running client side by players themselves, they aren't considered malware......no legit poker site would ever put a trojan in their software, it makes no sense and I wouldn't understand anyone downloading a client from any source but the poker site...no poker site that I have ever heard of or seen has included malware in any package, it's usually used by freeware software as a way of subsadising development codts.

If you are still paranoind then I'd suggest not playing online poker, if you want good protection against warez and pr0n sites installing malware though nothing beats a combination of a good anti-virus (say AVG or NOD32), Ad-Aware and MS defender.