HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug

Data type Range Default value
REG_SZ 0 | 1 1


Determines whether or not the debugger specified in the value of the Debugger entry is started automatically when an application error occurs.

Value Meaning
0 The system displays a message box notifying the user when an application error occurs.
1 The debugger is started automatically.

If the Debugger entry contains the name of a valid debugger (such as Drwtsn32, WinDbg, or NTSD), the user can choose to terminate the application by clicking OK or to run the debugger by clicking Cancel. (If no debugger is specified, there is no Cancel button in the message box.)