I don't know if this counts or not, but when I used Vista, (I didn't give it up because of anything bad), I used Comodo 2-way, but in basic, unless you are a real pro do not install it in Advanced mode, with Clamwin Anti-Virus. This is the combo I now use on my XP Pro 64 bit edition. I would use the same as I do on the 32 bit side, but I couldn't get VCOM System Suite 8's Net Defense 2-way Firewall to work in Vista, so didn't think it would work in XP Pro 64.