innoreg — Inno Setup Registry

innoreg customizes Windows Registry.



Keys Content
HKCR [1] → HKCU\Software\Classes + HKLM\Software\Classes
HKLM HKLM\SYSTEM\CurrentControlSet\Control\hivelist
HKLM\BCD00000000 B:\Boot\ BCD [2]
HKLM\SAM C:\Windows\System32\config\ SAM
HKLM\SECURITY C:\Windows\System32\config\ SECURITY
HKLM\SOFTWARE C:\Windows\System32\config\ SOFTWARE
HKLM\SYSTEM C:\Windows\System32\config\ SYSTEM
HKU\.DEFAULT [3] C:\Windows\System32\config\ DEFAULT
HKU\S-1-5-19 C:\Windows\ServiceProfiles\LocalService\ NTUSER.DAT
HKU\S-1-5-20 C:\Windows\ServiceProfiles\NetworkService\ NTUSER.DAT
[1] Write to HKCU or HKLM to modify HKCR, do not let HKCR choose for you
[2] To name B: the boot partition, right click on “This PC” → Manage → Disk Management
[3] .DEFAULT is the HKCU of the logon desktop and the System and Trusted Installer accounts


usage: innoreg [-h] [-adelqrsuvx] [file] ...

Inno Setup Registry 0.4

positional arguments:
  files          *.ireg (expand and compile) or *.iss (compile)

optional arguments:
  -h, --help     show this help message and exit
  -a, --admin    auto-selected if key other than HKCU
  -d, --default  HKCU is C:\Users\Default
  -e, --expand   expand only, do not compile to *.exe
  -l, --lang     always shop language dialog
  -q, --quiet    hide errors
  -r, --reboot   prompt the user to restart the system
  -s, --start    start the new *.exe
  -u, --users    HKCU is C:\Users\Default + current user
  -v, --verbose  detail all actions and sections
  -x, --x86      32 bit registry only

no file: -e stdin to stdout

Example: compile 3 scripts in parallel then start the created executables:

pip install innoreg
innoreg -s file1.ireg file2.iss file3.ireg

The expansion of the 2 scripts *.ireg is sequential to ensure consistency of the error messages. The command ends when all executables are started, but does not wait for the end of these executables.

Exit status:

0: success 1: missing file 2: syntax error

The innoreg command calls the innoreg() function:

from innoreg import *
innoreg(('file1.ireg', 'file2.iss', 'file3.ireg'), 's')

Inno Setup 6 is used if both versions 5u and 6 are installed. The *.ireg scripts must be in UTF-8 but not necessarily signed. The *.iss scripts created by innoreg are in UTF-8 with BOM signature because Inno Setup 5u and 6 assume that an unsigned file is ANSI encoded.


innoreg syntax is shorter than *.reg files, the reg command and PowerShell’s *-ItemProperty:



        Advanced\HideFileExt 0 1

        AutoplayHandlers\DisableAutoplay 1

        CLSID\{20d04fe0-3aea-1069-a2d8-08002b30309d}\ 'PC'

        +Serialize\StartupDelayinmsec 0

The first line contains the languages ​​to include in the executable, version 0.4 offers en and fr.

The value HideFileExt of type REG_DWORD is 0 if the box is checked, 1 if unchecked. DisableAutoplay is 1 if checked, is deleted if unchecked. The default value of the key {...} is “PC” if checked, is deleted if unchecked.

Values are of type REG_SZ in simple quotes, REG_EXPAND_SZ with a %variable%, REG_MULTI_SZ in double quotes, REG_BINARY in dots, REG_DWORD without decorator.

Adding + at line beginning creates the key if checked, deletes the key if unchecked. - deletes the key if checked, creates the key if unchecked.

Do not worry about the key WoW6432Node (Windows on Windows 64 bit, 32 bit Node), innoreg writes all directives in 32 bit and 64 bit.

Administrator privileges

admin.iregen fr

HKLM\Software\Policies\Microsoft\Windows\Explorer\DisableNotificationCenter 1!


        Power\HibernateEnabled - 1

        Session Manager\Memory Management\PagingFiles "" "?:\pagefile.sys"

Any key other than HKCU activates the -a option that causes run as administrator.

Adding ! at line ending marks the exclusivity between HKCU and HKLM, the value is deleted of HKCU if defined in HKLM and vice versa, useful for Group Policy.

Writing - deletes the value, HibernateEnabled is deleted if checked, but not PagingFiles.

If several languages are included but not the final system language, a window offers the user to choose among the included languages.

Custom messages

custom.iregen fr


        Advanced\HideFileExt 0 1
        Show file extensions
        Afficher les extensions des fichiers

        CLSID\{20d04fe0-3aea-1069-a2d8-08002b30309d}\ 'PC'
        Rename “This PC” to “PC”
        Renommer “Ce PC” en “PC”


        Hide Documents
        Cacher Documents

Personalize messages if the values are not very explicit or have a meaning opposite to the desired effect: HideFileExt becomes “Show file extensions”.

Write the messages in the language declaration order. If a message is missing, the message of the first language is displayed, start with English if possible. If an item has only one message, it is hard-coded as Description and does not overload the CustomMessages section.

Long example


Inno Setup 5 classic wizard has a fixed size. Inno Setup 6 modern wizard can expand up to 50%, innoreg sets the size according to the checkboxes.

Source code usable with administrator privileges, but some other registry keys require higher permissions.

Full permissions

trusted.iregen fr

HKLM\BCD00000000\Objects\{d810e1d4-0aa2-11e9-9b99-f526ca416017}\Elements\1600006c\Element .01.
Hide Windows logo at startup
Cacher le logo Windows au démarrage


        {679f85cb-0220-4080-b29b-5540cc05aab6}\ShellFolder\Attributes a0600000 a0100000
        Hide Quick access
        Cacher l’accès rapide

        {f02c1a0d-be21-4350-88b0-7367fc96ef3c}\ShellFolder\Attributes b0940064 b0040064
        Hide Network
        Cacher le réseau


        7516b95f-f776-4464-8c53-06167f40cc99\3c0bc021-c8a8-4e07-a973-6b14cbcb2b7e\ACSettingIndex 0
        Do not turn off screen after 10 minutes
        Ne pas éteindre l’écran après 10 minutes

        238c9fa8-0aad-41ed-83f4-97be242c8f20\29f6c1db-86da-48c5-9fdb-f2b67b1f44da\ACSettingIndex 0
        Do not go to sleep after 30 minutes
        Ne pas mettre le PC en veille après 30 minutes

innoreg does not handle permissions higher than administrator. You can run your executable as Trusted Installer with ExecTI to get full permissions on HKLM but HKCU will be the Trusted Installer account, this account has no profile, so HKCU will be HKU\.DEFAULT.

You cannot create a wizard that modifies both HKLM with full permissions and HKCU for the current user.


0.4: February 16, 2019 — First beta release, Inno Setup 6
0.3: February 8, 2019 — import * imports innoreg() only
0.2: January 29, 2019 — Packaging with setuptools and metadata
0.1: January 28, 2019 — First alpha release