Short name creation options: registry value NtfsDisable8dot3NameCreationComputerHKLM\System\CurrentControlSet\Policies

Policy ID: ShortNameCreationSettings
Scope: Computer Configuration
Supported on: At least Windows Server 2008 R2 or Windows 7
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: System › Filesystem › NTFS

Registry

NtfsDisable8dot3NameCreation

REG_DWORDComputer

HKLM\System\CurrentControlSet\Policies Current key

Enabled value: Depends on the option value
Element: Short name creation options

Options
Item	Stored value
Enable on all volumes	0
Disable on all volumes	1
Enable / disable on a per volume basis	2
Disable on all data volumes	3

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Policies]

; Options (use only one)
; Enable on all volumes
"NtfsDisable8dot3NameCreation"=dword:00000000
; Disable on all volumes
"NtfsDisable8dot3NameCreation"=dword:00000001
; Enable / disable on a per volume basis
"NtfsDisable8dot3NameCreation"=dword:00000002
; Disable on all data volumes
"NtfsDisable8dot3NameCreation"=dword:00000003

CMD

:: Options (use only one)

:: Enable on all volumes
reg add "HKLM\System\CurrentControlSet\Policies" /v "NtfsDisable8dot3NameCreation" /t REG_DWORD /d 0 /f
:: Disable on all volumes
reg add "HKLM\System\CurrentControlSet\Policies" /v "NtfsDisable8dot3NameCreation" /t REG_DWORD /d 1 /f
:: Enable / disable on a per volume basis
reg add "HKLM\System\CurrentControlSet\Policies" /v "NtfsDisable8dot3NameCreation" /t REG_DWORD /d 2 /f
:: Disable on all data volumes
reg add "HKLM\System\CurrentControlSet\Policies" /v "NtfsDisable8dot3NameCreation" /t REG_DWORD /d 3 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\System\CurrentControlSet\Policies' -Force | Out-Null

# Options (use only one)
# Enable on all volumes
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Policies' -Name 'NtfsDisable8dot3NameCreation' -PropertyType DWord -Value 0 -Force | Out-Null
# Disable on all volumes
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Policies' -Name 'NtfsDisable8dot3NameCreation' -PropertyType DWord -Value 1 -Force | Out-Null
# Enable / disable on a per volume basis
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Policies' -Name 'NtfsDisable8dot3NameCreation' -PropertyType DWord -Value 2 -Force | Out-Null
# Disable on all data volumes
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Policies' -Name 'NtfsDisable8dot3NameCreation' -PropertyType DWord -Value 3 -Force | Out-Null