Originally posted here by Danielsd
For the moment i feel free from worms and viruses, so i'm not wanting to isntall something .
I think that i have 90% security with my antivirus program and firewall.
Sorry Danielsd, But with what you have, an AV and a firewall, I would say you are only about 50% protected. Properly configured, a firewall is great, but it will not stopa user from comprimising their own system. A good AV will also not catch alot of the worms and trojans that a user might inflict on them selves.

Alot of malware will disable your firewall and AV as it loads, basically rendering them ineffective. The programs that nihil listed for you will catch most of these before they can do any damage.

And yes, you are right, there is no 100%, but you sure can get higher than 50%.