Configure maintenance windows for automatic updates: registry value MaintenanceWindowEnabled and 16 moreComputerHKLM\Software\Policies\Microsoft\Windows\WindowsUpdate

Policy ID: MaintenanceWindow
Scope: Computer Configuration
Supported on: At least Windows 11 Version 24H2
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Windows Update › Manage end user experience

Registry

MaintenanceWindowEnabled

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: 1
Disabled value: 0

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Enabled
"MaintenanceWindowEnabled"=dword:00000001
; Disabled
"MaintenanceWindowEnabled"=dword:00000000

CMD

:: Options (use only one)

:: Enabled
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowEnabled" /t REG_DWORD /d 1 /f
:: Disabled
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowEnabled" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowEnabled' -PropertyType DWord -Value 1 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowEnabled' -PropertyType DWord -Value 0 -Force | Out-Null

MaintenanceWindowUpdateActions

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Update actions only allowed inside the maintenance window:

Options
Item	Stored value
Download, install, and restart	1
Install and restart	2
Restart only	3

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Download, install, and restart
"MaintenanceWindowUpdateActions"=dword:00000001
; Install and restart
"MaintenanceWindowUpdateActions"=dword:00000002
; Restart only
"MaintenanceWindowUpdateActions"=dword:00000003

CMD

:: Options (use only one)

:: Download, install, and restart
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowUpdateActions" /t REG_DWORD /d 1 /f
:: Install and restart
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowUpdateActions" /t REG_DWORD /d 2 /f
:: Restart only
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowUpdateActions" /t REG_DWORD /d 3 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Download, install, and restart
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowUpdateActions' -PropertyType DWord -Value 1 -Force | Out-Null
# Install and restart
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowUpdateActions' -PropertyType DWord -Value 2 -Force | Out-Null
# Restart only
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowUpdateActions' -PropertyType DWord -Value 3 -Force | Out-Null

MaintenanceWindowStartDate

REG_SZComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Start date (Format: yyyy-mm-dd example: 2025-10-30)
Value type: REG_SZ

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"MaintenanceWindowStartDate"="<enter value>"

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowStartDate" /t REG_SZ /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowStartDate' -PropertyType String -Value '<enter value>' -Force | Out-Null

MaintenanceWindowStartTime

REG_SZComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Start time (Format: hh:mm example: 23:30 for 11:30 PM)
Value type: REG_SZ

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"MaintenanceWindowStartTime"="<enter value>"

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowStartTime" /t REG_SZ /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowStartTime' -PropertyType String -Value '<enter value>' -Force | Out-Null

MaintenanceWindowDurationHours

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Duration (hours):
Value type: REG_DWORD
Required: true
Minimum value: 2
Maximum value: 24

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"MaintenanceWindowDurationHours"=dword:<enter value>

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowDurationHours" /t REG_DWORD /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowDurationHours' -PropertyType DWord -Value '<enter value>' -Force | Out-Null

MaintenanceWindowRepeatScheduleOption

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Select repeat schedule:

Options
Item	Stored value
No repeat	1
Daily	2
Weekly	3
Monthly	4

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; No repeat
"MaintenanceWindowRepeatScheduleOption"=dword:00000001
; Daily
"MaintenanceWindowRepeatScheduleOption"=dword:00000002
; Weekly
"MaintenanceWindowRepeatScheduleOption"=dword:00000003
; Monthly
"MaintenanceWindowRepeatScheduleOption"=dword:00000004

CMD

:: Options (use only one)

:: No repeat
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowRepeatScheduleOption" /t REG_DWORD /d 1 /f
:: Daily
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowRepeatScheduleOption" /t REG_DWORD /d 2 /f
:: Weekly
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowRepeatScheduleOption" /t REG_DWORD /d 3 /f
:: Monthly
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowRepeatScheduleOption" /t REG_DWORD /d 4 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# No repeat
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowRepeatScheduleOption' -PropertyType DWord -Value 1 -Force | Out-Null
# Daily
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowRepeatScheduleOption' -PropertyType DWord -Value 2 -Force | Out-Null
# Weekly
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowRepeatScheduleOption' -PropertyType DWord -Value 3 -Force | Out-Null
# Monthly
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowRepeatScheduleOption' -PropertyType DWord -Value 4 -Force | Out-Null

MaintenanceWindowWeeklySunday

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Checked: 1
Unchecked: 0
Element: Sunday
Value type: REG_DWORD

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Checked
"MaintenanceWindowWeeklySunday"=dword:00000001
; Unchecked
"MaintenanceWindowWeeklySunday"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklySunday" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklySunday" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklySunday' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklySunday' -PropertyType DWord -Value 0 -Force | Out-Null

MaintenanceWindowWeeklyMonday

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Checked: 1
Unchecked: 0
Element: Monday
Value type: REG_DWORD

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Checked
"MaintenanceWindowWeeklyMonday"=dword:00000001
; Unchecked
"MaintenanceWindowWeeklyMonday"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyMonday" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyMonday" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyMonday' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyMonday' -PropertyType DWord -Value 0 -Force | Out-Null

MaintenanceWindowWeeklyTuesday

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Checked: 1
Unchecked: 0
Element: Tuesday
Value type: REG_DWORD

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Checked
"MaintenanceWindowWeeklyTuesday"=dword:00000001
; Unchecked
"MaintenanceWindowWeeklyTuesday"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyTuesday" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyTuesday" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyTuesday' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyTuesday' -PropertyType DWord -Value 0 -Force | Out-Null

MaintenanceWindowWeeklyWednesday

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Checked: 1
Unchecked: 0
Element: Wednesday
Value type: REG_DWORD

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Checked
"MaintenanceWindowWeeklyWednesday"=dword:00000001
; Unchecked
"MaintenanceWindowWeeklyWednesday"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyWednesday" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyWednesday" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyWednesday' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyWednesday' -PropertyType DWord -Value 0 -Force | Out-Null

MaintenanceWindowWeeklyThursday

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Checked: 1
Unchecked: 0
Element: Thursday
Value type: REG_DWORD

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Checked
"MaintenanceWindowWeeklyThursday"=dword:00000001
; Unchecked
"MaintenanceWindowWeeklyThursday"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyThursday" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyThursday" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyThursday' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyThursday' -PropertyType DWord -Value 0 -Force | Out-Null

MaintenanceWindowWeeklyFriday

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Checked: 1
Unchecked: 0
Element: Friday
Value type: REG_DWORD

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Checked
"MaintenanceWindowWeeklyFriday"=dword:00000001
; Unchecked
"MaintenanceWindowWeeklyFriday"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyFriday" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklyFriday" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyFriday' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklyFriday' -PropertyType DWord -Value 0 -Force | Out-Null

MaintenanceWindowWeeklySaturday

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Checked: 1
Unchecked: 0
Element: Saturday
Value type: REG_DWORD

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Checked
"MaintenanceWindowWeeklySaturday"=dword:00000001
; Unchecked
"MaintenanceWindowWeeklySaturday"=dword:00000000

CMD

:: Options (use only one)

:: Checked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklySaturday" /t REG_DWORD /d 1 /f
:: Unchecked
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowWeeklySaturday" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Checked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklySaturday' -PropertyType DWord -Value 1 -Force | Out-Null
# Unchecked
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowWeeklySaturday' -PropertyType DWord -Value 0 -Force | Out-Null

MaintenanceWindowMonthlySchedule

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Monthly Schedule Type:

Options
Item	Stored value
Date-based	1
Week-based	2
Last day of the month	3

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Date-based
"MaintenanceWindowMonthlySchedule"=dword:00000001
; Week-based
"MaintenanceWindowMonthlySchedule"=dword:00000002
; Last day of the month
"MaintenanceWindowMonthlySchedule"=dword:00000003

CMD

:: Options (use only one)

:: Date-based
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlySchedule" /t REG_DWORD /d 1 /f
:: Week-based
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlySchedule" /t REG_DWORD /d 2 /f
:: Last day of the month
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlySchedule" /t REG_DWORD /d 3 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Date-based
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlySchedule' -PropertyType DWord -Value 1 -Force | Out-Null
# Week-based
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlySchedule' -PropertyType DWord -Value 2 -Force | Out-Null
# Last day of the month
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlySchedule' -PropertyType DWord -Value 3 -Force | Out-Null

MaintenanceWindowMonthlyMonthBasedDayOfMonth

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Day of the Month:
Value type: REG_DWORD
Required: true
Minimum value: 1
Maximum value: 28

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"MaintenanceWindowMonthlyMonthBasedDayOfMonth"=dword:<enter value>

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyMonthBasedDayOfMonth" /t REG_DWORD /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyMonthBasedDayOfMonth' -PropertyType DWord -Value '<enter value>' -Force | Out-Null

MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Occurrence in Month

Options
Item	Stored value
First	1
Second	2
Third	3
Fourth	4
Last	5

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; First
"MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth"=dword:00000001
; Second
"MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth"=dword:00000002
; Third
"MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth"=dword:00000003
; Fourth
"MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth"=dword:00000004
; Last
"MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth"=dword:00000005

CMD

:: Options (use only one)

:: First
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth" /t REG_DWORD /d 1 /f
:: Second
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth" /t REG_DWORD /d 2 /f
:: Third
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth" /t REG_DWORD /d 3 /f
:: Fourth
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth" /t REG_DWORD /d 4 /f
:: Last
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth" /t REG_DWORD /d 5 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# First
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth' -PropertyType DWord -Value 1 -Force | Out-Null
# Second
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth' -PropertyType DWord -Value 2 -Force | Out-Null
# Third
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth' -PropertyType DWord -Value 3 -Force | Out-Null
# Fourth
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth' -PropertyType DWord -Value 4 -Force | Out-Null
# Last
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedOccurrenceInMonth' -PropertyType DWord -Value 5 -Force | Out-Null

MaintenanceWindowMonthlyWeekBasedDayOfTheWeek

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate Current key

Enabled value: Depends on the option value
Element: Day of the Week

Options
Item	Stored value
Sunday	1
Monday	2
Tuesday	3
Wednesday	4
Thursday	5
Friday	6
Saturday	7

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.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate]

; Options (use only one)
; Sunday
"MaintenanceWindowMonthlyWeekBasedDayOfTheWeek"=dword:00000001
; Monday
"MaintenanceWindowMonthlyWeekBasedDayOfTheWeek"=dword:00000002
; Tuesday
"MaintenanceWindowMonthlyWeekBasedDayOfTheWeek"=dword:00000003
; Wednesday
"MaintenanceWindowMonthlyWeekBasedDayOfTheWeek"=dword:00000004
; Thursday
"MaintenanceWindowMonthlyWeekBasedDayOfTheWeek"=dword:00000005
; Friday
"MaintenanceWindowMonthlyWeekBasedDayOfTheWeek"=dword:00000006
; Saturday
"MaintenanceWindowMonthlyWeekBasedDayOfTheWeek"=dword:00000007

CMD

:: Options (use only one)

:: Sunday
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedDayOfTheWeek" /t REG_DWORD /d 1 /f
:: Monday
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedDayOfTheWeek" /t REG_DWORD /d 2 /f
:: Tuesday
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedDayOfTheWeek" /t REG_DWORD /d 3 /f
:: Wednesday
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedDayOfTheWeek" /t REG_DWORD /d 4 /f
:: Thursday
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedDayOfTheWeek" /t REG_DWORD /d 5 /f
:: Friday
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedDayOfTheWeek" /t REG_DWORD /d 6 /f
:: Saturday
reg add "HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate" /v "MaintenanceWindowMonthlyWeekBasedDayOfTheWeek" /t REG_DWORD /d 7 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Force | Out-Null

# Options (use only one)
# Sunday
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedDayOfTheWeek' -PropertyType DWord -Value 1 -Force | Out-Null
# Monday
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedDayOfTheWeek' -PropertyType DWord -Value 2 -Force | Out-Null
# Tuesday
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedDayOfTheWeek' -PropertyType DWord -Value 3 -Force | Out-Null
# Wednesday
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedDayOfTheWeek' -PropertyType DWord -Value 4 -Force | Out-Null
# Thursday
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedDayOfTheWeek' -PropertyType DWord -Value 5 -Force | Out-Null
# Friday
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedDayOfTheWeek' -PropertyType DWord -Value 6 -Force | Out-Null
# Saturday
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\WindowsUpdate' -Name 'MaintenanceWindowMonthlyWeekBasedDayOfTheWeek' -PropertyType DWord -Value 7 -Force | Out-Null