AV and FW help

Hi all,
I have begun the painstaking process of upgrading the software side of my sim from WinXP/FS9 to Win7/FSX 64bit.

I am looking for recommendations on Antivirus/Firewall programs. All I'll be doing on the system is Flying online, and FSX related connections and Win7/Microsoft required updates/connections.

I have full versions of McAfee VirusScan Plus, and Symantec End Point Protection 12.1 but would prefer to not have the system overhead.

I would also prefer the package to free if possible.

Any ideas would be appreciated!

Warren

Microsoft Security Essentials. Free, light and effective.

avg free excellent product with minimal impact, then spybot to check for spyware occasionally
regards
geoff