Could not find the moved thread on this subject but I have just upgraded to ZoneAlarm Extreme Security 11.0.780.000 and today bought Diskeeper 12 and installed. Compatibility issues do not seem to have been addressed as I ran into the same problems where the Diskeeper console will not load. Wish I had have joined this forum prior to buying Diskeeper. Any developing news on a fix? I swear by my ZoneAlarm's security and I also like my defrags on-the -fly.