Configure Windows Recovery Environment (Windows RE) and System Reset.
Syntax Display Windows Recovery Environment (Windows RE) configuration: REAGENTC.exe /info [/target dir_name] [/logpath file_path] Set the location of the custom Windows Recovery Environment (Windows RE) image: REAGENTC.exe /setreimage /path dir_path_to_win_RE_image [/target dir_path_to_offline_image] [/logpath file_path] Enable any active WindowsRE image that is mapped to the online image: REAGENTC.exe /enable [/auditmode] [/osguid bcd_guid] [/logpath file_path] Disable any active WindowsRE image that is mapped to the online image: (Windows RE can help resolve startup problems; disabling it is not recommended.) This command can only be used from the running Operating System. REAGENTC.exe /disable [/logpath file_path] Specify that Windows RE start automatically the next time the system starts: This command can only be used from the running Operating System. REAGENTC.exe /boottore [/logpath file_path] Add an entry to the Reset and Restore page in the boot menu: REAGENTC.exe /setbootshelllink /configfile xml_name[/target dir_name] [/logpath file_path] Key: /auditmode [Windows 11], by default Windows will not perform any actions when Windows is in audit mode. To over-ride this default and enable WindowsRE from audit mode specify /auditmode e.g. /enable /auditmode If you generalise the image after using /enable in audit mode WindowsRE is disabled until you use enable again or until after the specialize configuration pass runs. /configfile xml_name Specifies the path to the XML configuration file for the boot menu entry. /logpath file_path The path of log file. If this argument is not specified, the default path is Windows\Logs\Reagent\Reagent.log. /osguid bcd_guid Specifies the Boot Configuration Data (BCD) identifier of the target Windows installation. The identifier can be determined by running "bcdedit -enum -v". /path dir_path_to_win_RE_image The directory that contains the custom Windows RE image (winre.wim). /target dir_path_to_offline_image The Windows installation. If this argument is not specified, the running Operating System is used.
Some additional Windows 11 specific options are available here.
C:\> reagentc.exe /info
C:\> reagentc.exe /info /info /target C:\Windows /logpath C:\Temp\Reagent.log
C:\> reagentc.exe /info /setbootshelllink /configfile d:\linkdesc.xml /logpath C:\Temp\Reagent.log
C:\> reagentc.exe /info /setbootshelllink /configfile d:\linkdesc.xml /target C:\Windows
C:\> reagentc.exe /info /setreimage /path r:\Recovery\WindowsRE /logpath C:\Temp\Reagent.log
C:\> reagentc.exe /info /setreimage /path r:\Recovery\WindowsRE /target C:\Windows
C:\> reagentc.exe /info /enable /logpath C:\Temp\Reagent.log
C:\> reagentc.exe /info /enable /osguid {00000000-0000-0000-0000-000000000000}
C:\> reagentc.exe /info /disable /logpath C:\Temp\Reagent.log
C:\> reagentc.exe /info /boottore /logpath C:\Temp\Reagent.log
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KB5028997 - Manually resize a partition to install the WinRE update.
DISKPART - Disk Administration.