I've used Zone Alarm on every computer I've ever had. We just got a new laptop and it's running Vista (64 bit). I have no clue what the difference between the 32 bit Vista and 64 bit is other than the fact that Zone Alarm only works on 32 bit Vista. I just took a look at Comodo which I have seen recommended and it doesn't look like it will work for 64 bit either. Can someone recommend a free firewall that will work on 64 bit Vista? Thanks.