I've noticed that the "Update" process doesn't always complete. The progress bar shows 100%, but the window is still open. The green check mark and "complete" is not shown.
Task Manager can't terminate the process, and it ignores "Cancel" and the X-box in the upper right corner.
The only work-around I've found is to go back to the main ZoneAlarm window and request "Update" again. This seems to quickly determine that, yes, the update did finish and the green check mark appears briefly before the window closes as it shouldn
ZoneAlarm "update" didn't use to hang like this...