AAAArrrghghgh!
If only you read searched through previous questions and answers on here first!
Norton Internet Security (NIS) and Norton Antivirus (NAV) are probably the most vilified products on the market.
Uninstall NIS (you will probably need to get special instructions from the Symantec web site to do this as it f*cks so thoroughly with your system.
Then, re-installl ZoneAlarm and get your self a free copy of AVG antivirus and install that.
You can get AVG free from here:
http://free.grisoft.com/doc/5390/lng/us/tpl/v5 #avg-anti-virus-free