How to Add or Remove "Allow wake timers" from Power Options in Windows 10
The Allow wake timers setting in Power Options allows Windows to automatically wake your computer from sleep on a timer for scheduled tasks and other programs. You can set this to be enabled, disabled, or important wake timers only.
A wake timer is a timed event that wakes the PC from sleep and hibernate states at a specific time. For example, a task in Task Scheduler set with the "Wake the computer to run this task" check box checked.
Important wake timers are a new class of wake timer in Windows 10 that includes things like reboots after a Windows update that requires one. They supersede all other settings.
This tutorial will show you how to add or remove the Allow wake timers setting under Sleep in Power Options for all users in Windows 10.
You must be signed in as an administrator to be able to add or remove this setting in Power Options.
Contents
- Option One: Add or Remove "Allow wake timers" in Power Options using Command Prompt
- Option Two: Add or Remove "Allow wake timers" in Power Options using REG file
EXAMPLE: "Allow wake timers" in Power Options
1 Open an elevated command prompt.
2 Type the command below you want to use into the elevated command prompt, and press Enter.
(Add - default)
REG ADD HKLM\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\238C9FA8-0AAD-41ED-83F4-97BE242C8F20\BD3B718A-0680-4D9D-8AB2-E1D2B4AC806D /v Attributes /t REG_DWORD /d 2 /f
OR
(Remove)
powercfg -attributes SUB_SLEEP BD3B718A-0680-4D9D-8AB2-E1D2B4AC806D +ATTRIB_HIDE
3 You can now close the elevated command prompt if you like.
The downloaded .reg files below will modify the DWORD value in the registry key below.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\238C9FA8-0AAD-41ED-83F4-97BE242C8F20\BD3B718A-0680-4D9D-8AB2-E1D2B4AC806D
Attributes DWORD
1 = Remove
2 = Add
1 Do step 2 (add) or step 3 (remove) below for what you would like to do.
This is the default setting.
A) Click/tap on the Download button below to download the file below, and go to step 4 below.
Add_Allow_wake_timers_to_Power_Options.reg
Download
A) Click/tap on the Download button below to download the file below, and go to step 4 below.
Remove_Allow_wake_timers_from_Power_Options.reg
Download
4 Save the .reg file to your desktop.
5 Double click/tap on the downloaded .reg file to merge it.
6 When prompted, click/tap on Run, Yes (UAC), Yes, and OK to approve the merge.
7 You can now delete the downloaded .reg file if you like.
That's it,
Shawn Brink
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Add or Remove Allow wake timers to Power Options in Windows 10
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New #1
Just note that you must do this from an Administrator account. If you try to run from an elevated command prompt or .reg file in a standard account, you won't get a password popup, you just get errors.
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New #2
Correct. You must be signed in as an administrator to add or remove this power option, but all users will be able to change the setting for this power option.
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New #3
Is there a way to set a custom wake task (in Task Scheduler) as an "Important Wake Task"? I set up an auto wake timer to wake my PC each morning at 5am so it's ready to go when I get up but I don't want any other task waking the PC, except those designated as "Important" by Windows or by me.
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New #4
You may deselect "Wake the computer to run this task" in all tasks and select the item only in your important task. Run the following command via PowerShell and see what tasks will wake your computer.
Get-ScheduledTask | ? {$_.Settings.WakeToRun -eq $true -and $_.State -ne "Enabled"}
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New #5
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New #6
The powercfg command did not work for me:
(Add - default)
powercfg -attributes SUB_SLEEP BD3B718A-0680-4D9D-8AB2-E1D2B4AC806D -ATTRIB_HIDE
Before executing this there was no attributes key.
After executing it, there was an attributes key with value zero
Manually changing the value to '2' in the registry did however work.
--peter
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New #8
I'm pretty sure that the reason why can be found in the microsoft document called "404".
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Add or Remove Allow wake timers to Power Options in Windows 10
How to Add or Remove 'Allow wake timers' from Power Options in Windows 10Published by Shawn BrinkCategory: Performance & Maintenance
28 Dec 2021
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