I am using win7 professional - 64 bit.
I have used Zone Alarm Free Firewall for years without any problems. Yesterday I installed the latest version and started getting the following BSOD messages every few minutes:
IRQL_GT_ZERO_AT_SYSTEM_SERVICE Error: 0x000004A
Since that was the only change I made I uninstalled Zone Alarm and the problem has not come back since. I am now using another firewall but would prefer to go back to Zone Alarm if someone can tell me what to do about the BSOD problems. Maybe I will just wait for the next release of ZA and try that.