[Icemaster]

Your kinda talking two topics there...anti-virus is one, wireless security is another.

Macafee is a less expensive alternative to Symantec, I don't know how they rate on system demands. Zone Labs makes a great software firewall that you can download and use (the basic version) for free.

For the Wi-Fi, use the 128 bit encryption unless you want someone freeloading on your bandwidth. Virus dissemination via wi-fi? Haven't heard of that yet, but there's probably something out there I dont know about yet....