BUGCHECKFATAL is a system parameter that enables or disables the conversion of nonfatal bugchecks into fatal bugchecks. The system must be rebooted on a fatal bugcheck. A nonfatal bugcheck places an entry only in the error log and deletes the corresponding process.
This parameter should normally be OFF (0); you should set it ON (1) only when the executive is being debugged.
Setting the SYSTEM_CHECK parameter to 1 has the effect of setting BUGCHECKFATAL to ON (1).