To change power and sleep settings in Windows 11, open Start > Settings > System > Power & battery > Screen, sleep, & hibernate timeouts and pick times for battery and plugged in. In Windows 10, go to Start > Settings > System > Power & sleep. What the power button and closing the lid do is set in Control Panel > System and Security > Power Options.
Windows 11 has several independent timers that can make your screen go dark: “Turn my screen off after” and “Make my device sleep after” in Settings, System, Power and battery; a hibernate timer on PCs that support it, which counts from when the PC went to sleep; and, separately, the screen saver and Dynamic lock, which can lock your session. Find the one that fired and adjust that one. If you only need the screen on for a while, rather than changing the defaults, StayGreen from Automata Labs holds the display awake for a timed session or while a chosen app is in front, then releases it automatically.
Keep the screen on for exactly as long as you need, without touching your power settings.
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Which timers can turn off or lock my screen?
| Timer | Where to find it | What happens when it fires | Counts from |
|---|---|---|---|
| Turn my screen off after | Settings, System, Power and battery, Screen, sleep and hibernate timeouts | The display turns off, the PC keeps running | Last input |
| Make my device sleep after | Same page | The PC sleeps | Last input |
| Hibernate after (where available) | Same page, or advanced power options | The PC moves from sleep to hibernation | When the PC went to sleep |
| Screen saver Wait | Settings, Personalization, Lock screen, Screen saver | The screen saver starts, and can lock on resume | Last input |
| Dynamic lock | Settings, Accounts, Sign-in options | The PC locks | Your paired phone leaving Bluetooth range |
Each row has its own setting. Lengthening one does not lengthen the others, which is why “I set sleep to Never and my screen still goes off” is such a common complaint.
What do “Turn my screen off after” and “Make my device sleep after” do?
Microsoft’s Power settings in Windows 11 page lists both under Settings > System > Power & battery > Screen, sleep & hibernate timeouts, with separate values for battery and plugged-in use on laptops.
- Screen off only turns off the display. Your apps keep running, downloads continue, and moving the mouse brings the screen back. Microsoft’s power setting reference for the display idle timeout describes it as “the period of inactivity before the display is automatically turned off.”
- Sleep pauses the whole PC. The sleep idle timeout is “the duration of inactivity before the system automatically enters sleep.”
For both, “inactivity” means no keyboard or mouse input. Reading a long document without scrolling is inactivity, as far as Windows is concerned.
What are the default screen and sleep timeouts?
Microsoft has shortened the defaults to save energy. Its Power settings page lists these adjusted settings, in minutes:
| Setting | Modern standby devices | S3 devices |
|---|---|---|
| On battery, turn my screen off after | 3 | 3 |
| When plugged in, turn my screen off after | 5 | 5 |
| On battery, make my device sleep after | 3 | 10 |
| When plugged in, make my device sleep after | 5 | 15 |
Modern standby is the instant-on sleep model most recent laptops use; S3 is the traditional sleep state. If your PC uses these values and the screen goes dark sooner than you like, this is why.
How do I change power and sleep settings in Windows 10?
Microsoft’s Shut down, sleep, or hibernate your PC page gives the Windows 10 route: Start > Settings > System > Power & sleep. Set the screen and sleep times there. Additional power settings on the same page opens Power Options in Control Panel, where the power button, lid and hibernate settings live. Windows 10 support ended on October 14, 2025, so it no longer gets security updates.
Windows 11 vs Windows 10: where each setting lives
| Setting | Windows 11 | Windows 10 |
|---|---|---|
| Screen off and sleep timers | Settings > System > Power & battery > Screen, sleep, & hibernate timeouts | Settings > System > Power & sleep |
| Power button and lid actions | Control Panel > System and Security > Power Options > Choose what the power buttons do | Settings > System > Power & sleep > Additional power settings > Choose what the power button does |
| Show Hibernate in the power menu | Same page, Change settings that are currently unavailable, Shutdown settings | Same page, Change settings that are currently unavailable, Shutdown settings |
| Command line | powercfg /change | powercfg /change |
How do I change what the power button and closing the lid do?
These live in Control Panel on both versions. Microsoft’s steps:
- Select Search on the taskbar, type
control paneland select it. - Select System and Security.
- In the Power Options section, select Choose what the power buttons do.
- Select Change settings that are currently unavailable.
- For a laptop, expand When I close the lid in the On battery column and choose an action, such as Sleep. Repeat for Plugged in if you want.
- Expand When I press the power button and choose an action for each column, then save your changes.
The same page has a Shutdown settings section. Select Hibernate there, if your PC offers it, to add Hibernate to the power menu.
How does the hibernate timeout work?
Hibernate saves your session to disk and powers off almost completely. Microsoft’s Shut down, sleep, or hibernate your PC page says the option “might not be available for all PCs,” so do not worry if you do not see it.
The detail most people miss is when the timer starts. Microsoft’s reference for the hibernate idle timeout defines it as “the duration of time after sleep that the system automatically wakes and enters hibernation.” So it is not a third inactivity timer. It only matters once the PC is already asleep.
To add Hibernate to the Start power menu, use Shutdown settings in Power Options, as described in the power button steps above. Microsoft notes that PCs with InstantGo do not have the hibernate option.
Is the screen saver a separate timer?
Yes. It lives in a different place and does a different job. Microsoft’s screen saver guide puts it under Settings > Personalization > Lock screen > Screen saver, with a Wait value in minutes and an optional “On resume, display logon screen” box that locks your session.
If your screen goes dark and you have to sign in again, check this first. It is common on PCs set up years ago, and on work PCs where it is set by policy. Microsoft itself now recommends sleep over a screen saver to save energy.
What is Dynamic lock, and can it lock my PC by surprise?
Dynamic lock locks your PC when your phone walks away. Microsoft’s sign-in options page explains that it uses Bluetooth and “Windows will automatically lock within a minute after you’re out of Bluetooth range.” If your PC locks when you step away to make coffee, with your phone in your pocket, that is working as designed.
How do I change these timers quickly?
In Settings, as above, or from a Command Prompt with powercfg. Microsoft’s powercfg reference documents /change with values in minutes:
powercfg /change monitor-timeout-ac 15
powercfg /change standby-timeout-ac 30
powercfg /change hibernate-timeout-ac 120The -ac settings apply when plugged in; use -dc for battery. In Microsoft’s power setting reference, 0 means never for the display and sleep idle timeouts. On a work PC, these may be managed by your organization and reset on their own.
To jump straight to Power Options pages, Microsoft’s Control Panel commands reference lists:
control.exe /name Microsoft.PowerOptions /page pagePlanSettings
control.exe /name Microsoft.PowerOptions /page pageGlobalSettings
control.exe powercfg.cpl,,3The first edits the current plan’s settings, the second opens the system settings page with the power button options, and the third opens the advanced settings dialog.
Why does my screen still turn off when I set everything to Never?
A few common reasons:
- The screen saver fired, not the screen-off timer.
- Dynamic lock locked the PC because your phone left Bluetooth range.
- A policy reapplied shorter values on a managed PC.
- You are on battery on a Modern Standby laptop, where Windows ends keep-awake requests a few minutes after the sleep timeout. We explain that rule in why Windows still sleeps with a keep-awake app.
- The monitor turned itself off with its own power-saving setting.
To see what is currently holding the PC awake, or failing to, see our guide to powercfg /requests.
When is a keep-awake app better than changing the timers?
Short timers are good defaults. They save power and lock the screen when you walk away. The problem is the handful of times a day when you need the opposite: a presentation, a long read, a dashboard, a render.
Changing the timers for those moments means remembering to change them back. If you only need the screen on now and then, PowerToys Awake is free and may be all you need; we compare the two in StayGreen vs PowerToys Awake. StayGreen adds timed sessions and per-app rules and steps aside on battery, Battery Saver and lock, without changing your power settings. For other options, see the best keep-awake tool for Windows 11. A keep-awake app holds the screen on for the moment and leaves your defaults alone. Under the hood, apps ask Windows to keep the display on. Microsoft’s documentation for a power request of type PowerRequestDisplayRequired says: “The display remains on even if there is no user input for an extended period of time.”
Two limits to know. These requests are about the screen-off and sleep timers. Microsoft’s documentation for the related SetThreadExecutionState function notes that “this function does not stop the screen saver from executing.” And nothing an app does stops Dynamic lock or a manual lock.
Timed sessions and per-app rules, released on battery, on lock and when the timer ends.
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How does StayGreen fit with these timers?
StayGreen is a tray app that holds the display or the system awake, then gets out of the way. Its Microsoft Store listing describes:
- Timed sessions of 15 minutes, 30 minutes, 1 hour or 2 hours, or any duration up to 7 days, with a live countdown.
- Per-app rules: hold the display only while a named app, such as your presentation tool or dashboard, is in the foreground.
- Two modes: “Display and system” keeps the screen lit and blocks sleep; “System only” blocks sleep but lets the screen turn off, for unattended work.
- Automatic release: on battery and when Battery Saver switches on, when the lid closes with no external monitor, the moment you lock the PC, and when a timer ends.
- No changes to your settings: “It does not change your Windows power plan or edit your sleep settings.”
- Honest status: on Modern Standby laptops on battery, it tells you when Windows will end the request.
- No simulated input by default, and no network access.
In timer terms, StayGreen in Display and system mode covers rows one and two of the table above while it is active, and gives control back when it ends. Because it releases on lock, a screen saver that locks or Dynamic lock will end the hold. If you use a screen saver, check how it behaves on your PC, or set the screen saver Wait longer than your usual session.
Which setup should I use?
| Situation | Suggested setup |
|---|---|
| Office laptop, security matters | Short screen and sleep timers, Dynamic lock on, StayGreen timed sessions when presenting |
| Home desktop, long downloads | Normal screen timer, StayGreen “System only” mode while it downloads |
| Reading or watching a dashboard | StayGreen per-app rule for that app |
| Shared or kiosk PC | Managed power plan, not a keep-awake app |
| Screen keeps locking unexpectedly | Check screen saver and Dynamic lock first |
Frequently asked questions
What is the difference between screen off and sleep in Windows 11?
Screen off turns off only the display, and your apps keep running. Sleep pauses the whole PC until you wake it.
Why don’t I see a hibernate option?
Microsoft says hibernate “might not be available for all PCs.” Some devices do not offer it.
Does the hibernate timer start when I stop using the PC?
No. Microsoft defines it as the time after sleep before the PC moves into hibernation.
Does a keep-awake app stop the screen saver?
Not necessarily. Microsoft notes that one common keep-awake function does not stop the screen saver. Check your screen saver settings if the screen still changes.
Why are my sleep settings greyed out?
Usually because a work or school policy sets them. Microsoft’s Power policy reference says that when the display and sleep timeout policies are not configured, “users control this setting”, so a greyed-out or resetting timer generally means one is configured. Ask your IT team. In Power Options, the power button and shutdown options also stay greyed out until you select Change settings that are currently unavailable.
How do I adjust the power and sleep settings on Windows 10?
Go to Start > Settings > System > Power & sleep and set the screen and sleep times. For power button, lid and hibernate options, select Additional power settings.
Is sleep or shutting down better?
Microsoft describes sleep as using very little power, starting faster and returning you to where you left off, and suggests it for short breaks. Hibernate uses less power than sleep. Shutting down turns the PC off completely, which suits longer absences or when you want a fresh start.
Will StayGreen change my power plan?
No. Its listing says it asks Windows for a power request and releases it, without editing your power plan or sleep settings.
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Get StayGreen from the Microsoft Store. It is a one-time purchase with no subscription, and the Store listing shows the current price.
Keep your strict defaults, and keep the screen on only when it matters.
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Last updated 23 October 2026. Published by Automata Labs, a software company in Canada.