Sleep mode turns off your screen and hard drive after a set time of inactivity, but you can disable it entirely or change when it kicks in

Sleep mode is a power-saving feature that puts your computer into a low-energy state when you haven't used it for a while. Your screen goes dark, your hard drive stops spinning, and your processor slows down — but the computer stays on and ready to wake up when ready when you move your mouse or press a key. If you want your computer to stay fully awake and responsive at all times, you can turn sleep mode off in your system settings.

The steps differ between Windows and Mac, and the location of the setting has moved around in recent Windows versions, so the exact path depends on what you're running. You can also adjust sleep behavior through power plans on Windows if you want separate settings for plugged-in versus battery power.

Key Takeaways

  • On Windows 11, sleep mode is controlled in Settings under System > Power & battery, where you set "Sleep times out after" to Never.
  • On Windows 10, go to Settings > System > Power & sleep and change the "When plugged in, PC goes to sleep after" dropdown to Never.
  • On Mac, open System Settings, go to General > Lock Screen, and set "Turn display off after" to Never.
  • Turning off sleep mode means your computer will use more electricity and generate more heat, so consider whether you actually need it off all the time.
  • If you only want to prevent sleep during specific tasks, you can set a shorter sleep timer instead of disabling it completely.

How to turn off sleep mode on Windows 11

Open Settings by pressing the Windows key and typing "settings," then click the Settings app. Go to System in the left sidebar, then click Power & battery. Under "Screen and sleep," you'll see two dropdown menus: one for "Screen times out after" and one for "Sleep times out after." Click the "Sleep times out after" dropdown and select Never. Your computer will no longer enter sleep mode automatically.

If you want your screen to turn off to save power but keep the computer itself awake, you can set the screen timeout to a shorter interval — say 5 or 10 minutes — while leaving sleep set to Never. This gives you the benefit of reduced power use without losing your active session. You can return to this same menu anytime to adjust the settings.

How to turn off sleep mode on Windows 10

Press the Windows key and type "settings," then open the Settings app. Click System, then Power & sleep in the left sidebar. Under "Sleep," you'll see a dropdown that says "When plugged in, PC goes to sleep after." Click it and select Never. If you're using a laptop and want to change the battery behavior as well, scroll down to the "Sleep" section under "On battery power" and set that to Never too.

Windows 10 also lets you adjust these settings through the Control Panel if you prefer. Press Windows key + R, type "powercfg.cpl," and press Enter. This opens the Power Options window, where you can click "Change plan settings" next to your active power plan and set both display and sleep timeouts to Never. The Control Panel route gives you access to more advanced options if you need them later.

How to turn off sleep mode on Mac

Click the Apple menu in the top-left corner and select System Settings. In the sidebar, click General, then click Lock Screen. You'll see a dropdown that says "Turn display off after." Click it and select Never. This prevents your Mac from sleeping and keeps the display on continuously.

If you want your display to turn off after a period of inactivity but keep your Mac awake, you can set this dropdown to a specific time — 5 minutes, 10 minutes, or whatever suits your workflow — instead of Never. You can also check the "Require password after screen saver begins" option if you want to lock your Mac when the display goes dark, which adds a layer of security without putting the computer to sleep.

Using power plans for more detailed control on Windows

If you want to set different sleep behaviors for plugged-in versus battery power, or if you want to control what happens when you close the laptop lid, the Power Plans feature gives you more options. Press Windows key + R, type "powercfg.cpl," and press Enter. You'll see your current power plan listed — usually "Balanced" or "High performance." Click "Change plan settings" next to it.

In the window that opens, you can set separate timeouts for "Turn off the display after" and "Put the computer to sleep after" for both plugged-in and battery modes. You can also click "Change advanced power settings" at the bottom to control what happens when you close the lid, press the power button, or press the sleep button. Setting everything to "Never" or "Do nothing" will prevent sleep mode entirely, while more granular settings let you keep sleep on for battery mode but off when plugged in.

Why you might want to keep sleep mode on

Turning off sleep mode means your computer will run at full power all the time, which increases your electricity bill and generates more heat. If you leave your computer on overnight or for long periods, the extra energy use adds up. Sleep mode is designed to balance convenience — your computer stays ready to use when ready — with energy savings when you step away.

If you're turning off sleep mode because you want to run background tasks or keep your computer available on a network, consider whether a shorter sleep timer might work instead. For example, setting sleep to 30 minutes instead of Never lets your computer power down during the day while still waking up quickly when you need it. You can always adjust the setting later if you find you're not using it the way you expected.

Frequently Asked Questions

Will turning off sleep mode damage my computer?

No, running your computer continuously won't damage it. However, it will generate more heat and wear out components slightly faster over many years. Make sure your computer has good ventilation and that dust isn't blocking the fans. If you're concerned about heat, you can use a laptop cooling pad or may support your desktop has adequate airflow.

Can I set different sleep times for different times of day?

Windows doesn't have a built-in scheduler for sleep times, but you can manually change the setting whenever you need to. If you need your computer to stay awake during work hours, you can change the setting in the morning and change it back in the evening. Some third-party tools exist for scheduling, but they're not necessary for most people.

What if my computer still goes to sleep even though I set it to Never?

Check whether a screensaver is turning on and triggering sleep. Open Settings, search for "screensaver," and set it to "None." Also check that you're not using a power-saving app that overrides your settings. If you're on a work network, your IT department may have enforced sleep settings that you can't change locally.

Does turning off sleep mode affect my monitor separately?

Yes. Your monitor and your computer have separate power settings. You can turn off the computer's sleep mode while still letting the monitor go dark after a few minutes. This saves power on the display without affecting the computer itself. Set the display timeout to a shorter interval than the sleep timeout.

How do I turn sleep mode back on if I change my mind?

Go back to the same settings menu where you turned it off. On Windows 11, that's Settings > System > Power & battery > "Sleep times out after," and on Mac it's System Settings > General > Lock Screen > "Turn display off after." Click the dropdown and select a time interval instead of Never.