I have worked out that the Force Field service in ZoneAlarm Extreme Security prevents the program EasyBCD from running. Using task manager to kill the module ISWSVC.exe which runs as a service will then allow EasyBCD to initiate.
Can anyone explain why Force Field would prevent an installed program from working and given that it does, why Force Field would not actually give any indication that it had done so? Or maybe it does but I do not know where to look for such "alarms".
If there is any documentation on Force Field - what it does, how it does it and if/how it can be configured, it would be really useful if someone can point me at it. There has to be a better & safer way than killing processes via task manager?