bootcfg debug

Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012

Adds or changes the debug settings for a specified operating system entry.


If you're attempting to debug port 1394, use the bootcfg dbg1394 command instead.


bootcfg /debug {on | off | edit}[/s <computer> [/u <domain>\<user> /p <password>]] [/port {COM1 | COM2 | COM3 | COM4}] [/baud {9600 | 19200 | 38400 | 57600 | 115200}] [/id <osentrylinenum>]


Parameter Description
{on | off | edit} Specifies the value for port debugging, including:
  • on. Enables remote debugging support by adding the /debug option to the specified <osentrylinenum>.
  • off. Disables remote debugging support by removing the /debug option from the specified <osentrylinenum>.
  • edit. Allows changes to port and baud rate settings by changing the values associated with the /debug option for the specified <osentrylinenum>.
/s <computer> Specifies the name or IP address of a remote computer (don't use backslashes). The default is the local computer.
/u <domain>\<user> Runs the command with the account permissions of the user specified by <user> or <domain>\<user>. The default is the permissions of the current logged on user on the computer issuing the command.
/p <password> Specifies the password of the user account that is specified in the /u parameter.
/port {COM1 | COM2 | COM3 | COM4} Specifies the COM port to be used for debugging. Don't use this parameter if debugging is disabled.
/baud {9600 | 19200 | 38400 | 57600 | 115200} Specifies the baud rate to be used for debugging. Don't use this parameter if debugging is disabled.
/id <osentrylinenum> Specifies the operating system entry line number in the [operating systems] section of the Boot.ini file to which the operating system load options are added. The first line after the [operating systems] section header is 1.
/? Displays help at the command prompt.


To use the bootcfg /debug command:

bootcfg /debug on /port com1 /id 2
bootcfg /debug edit /port com2 /baud 19200 /id 2
bootcfg /s srvmain /u maindom\hiropln /p p@ssW23 /debug off /id 2