Editing the registry is not difficult. Make sure you back it up. I would also create a restore point if using ME or XP. When you have done that, follow the instructions you got from Zone Labs.
I'm guessing they want you to delete any entries with Zone Alarm listed. I had to do that with Norton's Internet Security to get it completely off my computer. I found the entries, highlighted them and hit the delete key. Bingo, they were gone and my computer runs just fine. Actually, it runs better since I got rid of the conflicts.
I had a very frustrating problem with ZoneAlarm. Trying to fix it, I got lots of 'help' instructions from Zonelabs, all of which tried to walk me through the removal of ZoneAlarm. But nothing would completely remove it, and I keep getting an error page, and can't access the internet. Their final plan is to edit the registry (they want me to delete a key in HKEY_LOCAL_MACHINES), but they caution against doing so if one is not "comfortable" with tinkering with the registry, and I'm not.
Can someone direct me to a software (preferably downloadable freeware or shareware) that will 'fix' the registry by removing anything connected to the removed ZoneAlarm, and which are no longer needed, without messing it up?