I downloaded and installed ZoneAlarm Free AntiVirus with Firewall 2013. The link says it has all the features except support and parental control. Also, the free edition is updated every 24 hrs. as opposed to every hour paid version. I am using ZoneAlarm for the first time. All I know is that it is from a company named Check Point whose Full Disk Encryption tool is used in my Fortune 100 company. Has anyone used this anti-virus? How effective it is and how is the detection rate?