I have 3 XP computers with ZA Free and Norton System Works on each. After I downloaded the most recent ZA update on 2 of them, I could not update Norton antivirus (Norton error message LU1875). I am afraid to download the ZA update on the 3rd computer for fear of having the same problem. Is ther a fix for this?

Operating System:Windows XP Home Edition
Product Name:ZoneAlarm (Free)
Software Version: