Enable or Disable Wake Timers in Windows 10

Wake timers let Windows or scheduled apps wake a sleeping PC to run a task, such as installing updates or recording a scheduled event. You can allow or block them in Power Options, either for a power plan or separately when plugged in and on battery; you’ll need an administrator account to change some settings.

What You’ll Need

A Windows 10 PC that supports sleep or hibernation.
Access to Power Options. Sign in as an administrator if Windows asks for permission to change the plan.
The name of the active power plan, if you want to change settings for a particular plan.

Step-by-Step

Open Power Options. Select Start, type Control Panel, and open it. Choose Hardware and Sound, then Power Options. If Control Panel is showing small or large icons, select Power Options directly.
Find the active plan’s settings. Identify the selected plan (its radio button is filled), then select Change plan settings beside it. If you want to change a different plan, choose that plan instead. Changes apply to the plan you edit, not automatically to every plan.
Open advanced settings. Select Change advanced power settings. A small Power Options dialog appears with a list of expandable settings.
Expand the wake-timer setting. In the list, expand Sleep, then expand Allow wake timers. If you do not see this entry, check that the list is expanded and that you are editing a plan available on this PC. The setting may also be hidden or unavailable because of the device, Windows configuration, or a managed policy.
Choose whether to allow timers. Use the drop-down menu for On battery and Plugged in. Select Enable to allow scheduled timers to wake the PC, or Disable to prevent them. If the menu offers Important Wake Timers Only, that is a middle option: Windows can still allow timers it considers important. Choose it if you want fewer interruptions but do not want to block every timer.
Set each power condition deliberately. On a laptop, choose the battery and plugged-in values separately. For example, you can disable timers on battery and enable them while plugged in. On a desktop, the plugged-in setting is generally the relevant one.
Save the change. Select Apply, then OK. Close the remaining windows. The new setting affects future sleep or hibernation sessions; it does not wake a PC that is already shut down.
Check whether a timer is responsible for waking the PC. If it wakes unexpectedly, open Start, type cmd, and open Command Prompt. Run powercfg /lastwake to see information about the most recent wake. You can also run powercfg /waketimers to list currently scheduled wake timers. These commands help investigate, but they do not identify every possible cause of a wake.

Common Mistakes

Changing the wrong plan: A setting changed in one plan may not apply after Windows switches to another. Review the currently selected plan and change any other plans you use.
Setting only one power condition: Laptop settings distinguish between battery and plugged-in use. Check both drop-downs rather than assuming one choice covers both.
Expecting Disable to block every wake: Wake timers are only one cause. A mouse, keyboard, network adapter, scheduled maintenance, firmware, or a wake-capable device may also wake a PC.
Confusing sleep with shutdown: Wake timers are designed for sleep and, where supported, hibernation. They do not normally power on a fully shut-down computer; firmware options for scheduled power-on are separate.
Forgetting the change applies to a plan: If you switch plans, revisit the setting. Some devices or organization policies may also restrict which options you can edit.

Tips

Allow wake timers if you depend on a scheduled task that must run while the computer sleeps. Disabling them can prevent that task from waking Windows to run.
If you want to avoid battery drain or overnight interruptions, disable timers on battery, or use Important Wake Timers Only if that choice is available.
Before disabling timers, consider whether scheduled backups, maintenance, or other tasks need the PC awake. A task may still run the next time the computer is on, but timing and behavior depend on the task’s own settings.
Keep a note of the original setting so you can restore it if an expected scheduled task stops running.

Troubleshooting

“Allow wake timers” is missing. Reopen the active plan’s advanced settings and expand Sleep. If the entry still does not appear, the hardware, power plan, Windows configuration, or an administrator policy may hide it. On a work-managed computer, ask the administrator rather than trying to override a policy.

The PC still wakes after timers are disabled. Run powercfg /lastwake soon after the unexpected wake. Then check Device Manager: right-click Start, open Device Manager, find a likely device such as a mouse, keyboard, or network adapter, open its Properties, and look for a Power Management tab. If present, review whether Allow this device to wake the computer is enabled. Change it only for devices you do not need for waking the PC. Network wake settings can also be managed separately, and names vary by device.

A scheduled task no longer runs on time. Re-enable wake timers for the power condition in use. In Task Scheduler, inspect the task’s Conditions tab for an option such as Wake the computer to run this task; not every task offers or uses it. Also confirm the computer is sleeping rather than shut down, and that the task itself is enabled and scheduled correctly.

Settings revert or are unavailable. Confirm you selected Apply and edited the plan that is active. If the setting changes back, another plan, power-management utility, or organizational policy may be controlling it. Restarting Windows can help confirm a saved setting, but does not override a managed restriction.

Frequently Asked Questions

What does a wake timer do?
A wake timer allows Windows or a scheduled task to wake a sleeping or hibernating PC so it can perform work. It is not the same as a device waking the computer through its hardware.

Should I disable wake timers?
Disable them if you do not want scheduled timers waking the computer, especially on battery. Leave them enabled if an important scheduled task must run while the PC sleeps.

Can I allow wake timers only when plugged in?
Yes, on systems showing separate battery and plugged-in controls, set On battery to Disable and Plugged in to Enable.

Will disabling wake timers stop all unexpected wake-ups?
No. Devices such as a mouse, keyboard, or network adapter, as well as other system or firmware settings, can wake a PC independently of wake timers.

Do wake timers turn on a shut-down computer?
Usually not. This setting concerns sleep and supported hibernation states. Scheduled power-on from a full shutdown, if supported, is a separate firmware feature.

How can I see which timer woke my PC?
Run powercfg /lastwake after the wake, or powercfg /waketimers to inspect scheduled timers. The output may not provide a clear cause for every wake.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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