After my computer had been running strangely (long story), on a recommendation I downloaded and ran the free version of Malware-Bytes. It detected something called backdoor.IRCbot, which I had the program removed. Since then, my computer appears to be running more smoothly. Given the nature of this sort of malicious malware (worm?), I understand that it can be difficult to detect. What I'm wondering is this: is ZoneAlarm not designed to detect something like backdoor.IRCbot? I find it interesting that neither ZoneAlarm, McAfee, nor the Microsoft Malicious Software Removal Tool could detect this bot, yet Malware-Bytes did (for all appearances, anyways). I am using ZoneAlarm Extreme Security on Windows 7 (64-bit).