Import, export or delete registry settings from a text (.REG) file.
Syntax Export the Registry (all HKLM plus current user) REGEDIT /E pathname Export part of the Registry REGEDIT /E pathname "RegPath" Export part of the Registry in ANSI mode REGEDIT /A pathname "RegPath" (This is undocumented and will not support unicode-only keys/values.) Import a reg script REGEDIT pathname Silent import REGEDIT /S pathname Start the regedit GUI REGEDIT Open multiple copies of regedit REGEDIT /m Key /E : Export /S : Silent Import
All registry scripts start with a version string:
REGEDIT4 for ANSI/ASCII text strings - Windows 98 and Windows NT 4.0 (or any later versions of Windows.)
"Windows Registry Editor Version 5.00" for Unicode - Windows 2000, XP (or later)
Create a text file like this:Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\SomeKey] "SomeStringValue"="Hello"
Note the registry file should contain a blank line at the bottom of the file.
The registry file must use full names for registry hives (HKEY_LOCAL_MACHINE, HKEY_CURRENT_USER, etc.)
not short abbreviations (HKLM, HKCU, etc.).
When double clicking this .reg file the key and value will be added.
Alternatively run REGEDIT Myfile.REG from the command line.
Create a reg file like this, notice the hyphen inside the first bracketWindows Registry Editor Version 5.00 [-HKEY_CURRENT_USER\SomeKey]
When double clicking this .reg file the key "SomeKey" will be deleted along with all string, binary or Dword values in that key.
If you want to just delete values, leaving the key in place, set the value you want to delete = to a hyphen
e.g.Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\SomeKey] "SomeStringValue"=-
Again double click this .reg file to delete the values, or type REGEDIT /s MyFile.REG
Unlike REG.exe, REGEDIT will normally require elevation even when adding an item to HKCU,
after a sucessful elevation REGEDIT will give access to the whole registry, see elevation for more options.
regedit /e export.reg HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Audio
Export the same key in ANSI text format:
regedit /A ansi.reg HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Audio
Opening multiple copies of Regedit.exe (with /m) is useful for comparing keys between two registry hives or between two different computers (File, connect network registry) Press F5 to refresh the view.
Windiff is a useful alternative, this GUI utility from the resource kit will list all the differences.
Within a registry file, comments are prefixed with a semicolon "; "
; Turn the NUMLOCK on at login
Batch files will ignore any semicolons before a command, so this can be used to create a self-contained registry script.
Regedit remembers the last registry key that was opened from the last time it was running. This is stored in the registry under:
We can set the LastKey value property from the command line with a REG ADD command.
REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Applets\Regedit" /v "LastKey" /d "%_mykey%" /f
Start /b regedit
To activate registry changes in HKEY_CURRENT_USER without logging off:
RUNDLL32.EXE USER32.DLL,UpdatePerUserSystemParameters ,1 ,True
“I never make stupid mistakes. Only very, very clever ones” - John Peel
REG - Read, Set or Delete registry keys and values
SET - Display, set, or remove Windows NT environment variables
SETX - Set environment variables permanently
WMIC REGISTRY - Set registry options through WMI
Powershell: Get-ItemProperty / Set-ItemProperty - Retrieve / save registry Keys
Q322756 - How to backup and edit the registry
Q310516 - How to add, modify, or delete registry subkeys and values
DuReg - Registry Size Estimator. (Win 2K ResKit)
Registry - Commonly tweaked user interface settings (XP)