|Product:||Internet Security and Acceleration Server|
%1 failed to start. The failure occurred during %5 because the configuration property %4 of key %3 is not valid. Use the source location %6 to report the failure. The error code in the Data area of the event properties indicates the cause of the failure. For more information about this event, see ISA Server Help. The error description is: %2.
Service failed to start because the data in the storage is corrupt, due to incorrect configuration of either the registry or Active Directory.
If a backup exists, in ISA Management click Servers and Arrays, then right-click Name, and choose Restore. This will restore the configuration, except for server-specific configuration information, such as cache content. If this does not solve the problem, uninstall ISA Server from the Control Panel. You will lose all the configuration parameters and will have to reinstall. Reinstalling a new copy of ISA Server without uninstalling the previous copy will not solve the problem.