Hello, I need help on which firewall to install; comodo 32 bit or 64 bit. I am running a Dell Studio 540 (intel quad core CPU), vista home prem. 6GB ram, 750 GB HDD. The system is capable of running 64bit. However 95% of all installed software is 32bit. I was running Zonealarm but finally gave up on it because it kept crashing Firefox and causing the PC to hangup and not shutdown... forcing me to hold the power button until the system hard stopped. I uninstalled ZA this morning and downloaded both Comodo 32 and 64. I just need to know which would be best. Thanks for the help.