Your Windows 11 PC should slip into sleep when you step away — saving power, keeping your work safe, and waking instantly when you need it. Instead, it stays on all night, or it falls asleep for a moment and immediately wakes itself back up.
Windows 11 sleep mode not working is one of the most common — and most frustrating — Windows problems. The causes are almost always the same: sleep timers set to “Never,” wake timers left enabled, a network adapter pinging your PC back awake, or an outdated display driver. The fixes are all free and built into Windows — no downloads required.
Quick Answer
To fix Windows 11 sleep mode not working, go to Settings > System > Power & sleep and make sure sleep timers are set (not “Never”). Open Command Prompt as administrator and run powercfg /lastwake to identify what last woke your PC. Then disable wake timers under Power Options > Advanced settings, and turn off Wake-on-LAN under your network adapter’s Power Management tab. These steps resolve most sleep problems in under 10 minutes.
Fix 1: Check That Sleep Is Actually Turned On
This sounds obvious — but it’s the cause in more cases than you’d expect.
- Press Windows + I to open Settings.
- Go to System > Power & sleep.
- Under Sleep, set both “On battery” and “Plugged in” to a time you prefer — 15 or 30 minutes works for most people.
- On a desktop PC, you’ll only see “Plugged in” — that’s normal.
Pro tip: While you’re here, also check the Screen settings directly above. Your screen timeout should always be shorter than your sleep timer. If the screen never turns off, the PC may never reach the sleep state.
Troubleshooting tip: If the sleep dropdown is grayed out, a Group Policy setting or third-party app is locking it. Skip ahead to Fix 7 to reset your power plan — that usually clears it.
Fix 2: Disable Wake Timers
Wake timers are scheduled tasks — Windows Update, routine maintenance, or third-party apps — that Windows allows to pull the PC out of sleep. If your computer keeps waking at predictable times overnight, this is almost certainly the cause.
- Search for Power Options in the Start menu and open it.
- Click Change plan settings next to your active plan, then Change advanced power settings.
- In the list, find Sleep > Allow wake timers.
- Set both “On battery” and “Plugged in” to Disable.
- Click OK, then restart your PC.
Fix 3: Find Exactly What’s Waking Your PC
Windows has a built-in diagnostic tool that shows you — with precision — what last woke your PC and what’s blocking sleep right now.
- Search for Command Prompt, right-click it, and choose Run as administrator.
- Run this to see what device or task last woke your system:
powercfg /lastwake - Run this to list every active wake timer:
powercfg /waketimers - Run this to see what’s currently preventing your PC from sleeping:
powercfg /requests
Real-world example: A very common /lastwake result is a network adapter receiving a broadcast packet and waking the PC. Once you see the exact adapter name, you can disable it in Fix 4.
Pro tip: The /requests command often turns up media players, video-call apps like Teams or Zoom, or browser tabs playing audio. Closing them is sometimes all that’s needed.
Fix 4: Turn Off Wake-on-LAN on Your Network Adapter
Wake-on-LAN (WoL) is a feature that lets a network card power your PC on when it receives a signal — handy for IT departments, but annoying for home users whose router broadcasts all night.
- Press Windows + X and click Device Manager.
- Expand Network adapters.
- Right-click your Wi-Fi or Ethernet adapter and choose Properties.
- Click the Power Management tab.
- Uncheck Allow this device to wake the computer.
- Click OK.
Repeat this for every network adapter in the list. If you have both Wi-Fi and Ethernet, disable WoL on both — missing one will keep the problem going.
Troubleshooting tip: If there’s no Power Management tab, that driver doesn’t support WoL or it’s already disabled. Move to the next fix.
Fix 5: Update or Roll Back Your Display Driver
A broken or outdated display driver is a frequent cause of sleep failures — especially right after a Windows Update.
- Press Windows + X and click Device Manager.
- Expand Display adapters.
- Right-click your GPU (Intel, NVIDIA, or AMD) and choose Update driver > Search automatically for drivers.
If sleep stopped working after a recent update, try rolling back instead: right-click > Properties > Driver tab > Roll Back Driver. This often fixes the issue faster than waiting for a new driver release.
Pro tip: For NVIDIA and AMD graphics cards, downloading the driver directly from the manufacturer’s site usually provides a more stable, up-to-date version than Windows Update does.
Fix 6: Run the Built-in Power Troubleshooter
Windows 11 has a Power troubleshooter that automatically detects and fixes common sleep issues.
- Go to Settings > System > Troubleshoot > Other troubleshooters.
- Find Power and click Run.
- Apply any fixes suggested, then restart your PC.
It doesn’t catch every problem, but it’s a fast, low-effort step worth running before the more involved fixes.
Fix 7: Reset Your Power Plan to Default
If none of the above has worked, your power plan may have been corrupted — by an app, a Windows update, or old manual tweaks. One command resets all built-in power plans to factory defaults.
- Open Command Prompt as administrator.
- Type this command and press Enter:
powercfg -restoredefaultschemes - Restart your PC.
This only resets power settings — your files, apps, and all other Windows settings are completely untouched. After restarting, go back to Settings > System > Power & sleep and re-enter your preferred sleep timer, since the reset will have cleared it.
Common Mistakes to Avoid
- Sleep left on “Never.” This is the #1 reason sleep “stops working” — someone (or an app installer) set it to Never and forgot. Always start here.
- Wake timers still enabled. Leaving wake timers on means Windows Update or scheduled maintenance can drag your PC out of sleep at 3 a.m., every night. Disable them in Advanced Power Options.
- Disabling Wake-on-LAN on only one adapter. If you have both Wi-Fi and Ethernet adapters, you need to disable WoL on both. Missing one keeps the problem alive.
- Skipping
powercfg /requests. A media player, active video call, or a browser tab playing audio can silently block sleep indefinitely. This command exposes it in seconds. - Updating the driver when rolling it back is the right move. If sleep broke right after a Windows Update, the new driver is the problem. Roll it back — don’t reinstall the same broken version.
- Not restarting after changes. Power-related settings often don’t take full effect until after a complete restart, not just a sign-out or lock.
Frequently Asked Questions
Why does my Windows 11 PC wake up by itself at night?
Wake timers and Wake-on-LAN are the most common reasons. Run powercfg /lastwake in Command Prompt as administrator to see exactly which device or task triggered the last wake event.
How do I stop Windows 11 from waking up to install updates?
Go to Power Options > Advanced settings > Sleep > Allow wake timers, and set it to “Disable.” Windows Update will still install updates — it just won’t wake your PC from sleep to do so.
Why won’t my Windows 11 PC sleep even though I set a timer?
Something is holding an active power request. Run powercfg /requests as administrator to see a list of everything blocking sleep right now, then close or disable the offending app or device.
My PC sleeps fine on battery but not when plugged in. Why?
Windows uses completely separate settings for battery and plugged-in modes. Check Settings > System > Power & sleep and look specifically at the “Plugged in” sleep value — it’s commonly set to “Never” by default on desktops and some laptops.
Will resetting the power plan delete my files?
No. The powercfg -restoredefaultschemes command only resets power plan settings — sleep timers, screen timeouts, and similar values. Your personal files, apps, and other Windows settings are completely untouched.
Is it bad for my PC to never sleep?
On laptops, skipping sleep drains the battery and generates unnecessary heat. On desktops it wastes electricity every hour. Sleep mode is safe and helps extend hardware life — it’s worth fixing properly.
How do I confirm my PC successfully entered sleep mode?
Open Event Viewer (search for it in the Start menu), navigate to Windows Logs > System, and look for events with the source “Power-Troubleshooter.” Each entry records exactly when your PC left and returned from sleep, and what triggered the wake.
Conclusion
Windows 11 sleep mode problems almost always trace back to one of a short list of causes: a timer set to Never, wake timers left on, a network adapter pinging the PC awake, or a driver gone wrong after an update. Start with Fix 1 to check your timers, then run powercfg /lastwake to find the exact culprit. Work through the list — most people are sorted by Fix 2 or Fix 4.
If your laptop battery is still draining faster than expected even after getting sleep working, our guide on why your laptop battery drains so fast on Windows 11 covers the next level of power fixes. And if your PC still feels sluggish after all this, the 12-step guide to speeding up a slow Windows 11 PC is the next stop.