I just got a pop up window to update to 100-243-000 and I downloaded the file, an en_exe file then did the install. I have the Zone Alarm Pro also but I do not remember what the pop up window said exactly.

Anyway it all went just fine and advised me that the installation was successful and then will not allow me to input my license key. I copy the key from my purchase e-mail from Zone Alarm so I do not make any mistakes typing. Even if I accept the trial version for 30 days and then try to enter my license key, it will not accept it. I am using an older laptop with Windwows XP. I have two newer computers with Vista but I am not going to do any updates on them until I get this figured out.