I've just upgraded to ZoneAlarm Extreme Security (ZAES) V 9.1.603.00 by downloading and executing ZASPSetup_91_603.00.exe. The upgrade is from ZAES V 8.0.400.020. System is XP Pro SP3, Shuttle SN95G5 with Athlon 64 CPU (3500+, 2.2GHz), 1 GB RAM. Once ZAES is started the use of any single key on the keyboard causes the PC to crash (no BSOD), just straight into immediate restart - it's as effective as pressing the reset button on the PC's chassis.
Keyboard is Logitech wireless keyboard (model Y-RK49). Mouse is Logitech wired (model M-BT85).
Uninstall ZAES V 9.1.603.00 and reinstall V 8.0.400.020 and everything is working fine again.
Is ZAES 8 the end of my journey with Zone Alarm?