Follow my advice... download OA(olinearmor) or comodo.
Many people have their favorite software firewall just like a good wine.
I choose not to have a software firewall as I have adequate protection that my ISP supplied DSL modem has with Malwarbytes Anti-Malware (MBAM) and WinPatrol PLUS but if I did choose to have a software firewall I would choose Online Armor (OA)
E5200 2.5GHZ, 4GB RAM, 320GB HD, Windows 7 Home Premium 64bit, avast! V9.0 Free, IE10
P4 2.8GHZ, 1.5GB RAM, 40GB HD, XP Pro SP3 32bit, avast! V9.0 Free, Google Chrome
with hpHosts, MVPS HOSTS files, SpeedFan, WinPatrol PLUS