How to Fix Windows 11 Sleep Mode Not Working

Sleep Mode is designed to save power and quickly resume your work without restarting your PC. But if your Windows 11 computer refuses to sleep, wakes up randomly, or immediately turns back on after you put it to sleep, you’re not alone.

This issue is common and can be caused by background apps, misconfigured power settings, driver conflicts, or connected hardware. The good news is that fixing it doesn’t require complex tools — just a few adjustments in your system’s settings.

In this guide, we’ll walk you through all the proven methods to fix Sleep Mode not working in Windows 11.

Fix Windows 11 Sleep Mode Not Working

Before you begin, make sure you have administrator access to your system. It’s also a good idea to save any unsaved work before making changes to your power and driver settings.

Tip: If your PC wakes up right after entering Sleep Mode, it’s usually because a device, app, or scheduled task is configured to “wake” your computer automatically.

Step 1: Check Your Power Settings

Sleep issues often stem from incorrect or conflicting power configurations.

Press Windows + I to open Settings.
Go to System → Power & battery.
Under Power, click Screen and sleep.
Make sure the sleep timers are properly set — for example:
- On battery power, put my device to sleep after: 15 minutes
- When plugged in, put my device to sleep after: 30 minutes

If these settings are set to “Never,” your PC won’t enter Sleep Mode automatically.

Step 2: Disable Fast Startup

Fast Startup can sometimes interfere with how Windows handles Sleep and Hibernate states.

Press Windows + R, type control, and press Enter.
Go to Hardware and Sound → Power Options → Choose what the power buttons do.
Click Change settings that are currently unavailable.
Uncheck Turn on fast startup (recommended).
Click Save changes and restart your computer.

After restarting, test whether your system now enters Sleep Mode normally.

Step 3: Check for Devices That Prevent Sleep

Some connected devices, such as USB peripherals or network adapters, can prevent Windows from going to sleep. You can identify these devices using Command Prompt.

Press Windows + X and select Windows Terminal (Admin) or Command Prompt (Admin).
Run the following command: powercfg -requests
Review the list to see if any devices or processes are preventing sleep.

If you see an entry under “DISPLAY” or “SYSTEM,” note the process name and close or disable it temporarily.

To see which devices can wake your PC from sleep, run:

powercfg -devicequery wake_armed

If you find a device you don’t want to wake your PC (like a mouse or network adapter), disable that wake permission:

Open Device Manager (press Windows + X → Device Manager).
Find the device (for example, your mouse or network adapter).
Right-click it and select Properties → Power Management.
Uncheck Allow this device to wake the computer.
Click OK.

Step 4: Update or Roll Back Device Drivers

Outdated or corrupted drivers can interfere with power management features.

Press Windows + X and select Device Manager.
Expand Display adapters, Network adapters, and System devices.
Right-click each device and select Update driver → Search automatically for drivers.

If the issue started after a recent update, you can roll back a problematic driver:

Right-click the device → Properties → Driver tab.
Click Roll Back Driver (if available).

Restart your PC after updating or rolling back drivers and test Sleep Mode again.

Step 5: Run the Power Troubleshooter

Windows 11 includes a built-in troubleshooter that can automatically detect and repair sleep-related problems.

Open Settings → System → Troubleshoot → Other troubleshooters.
Scroll down and find Power.
Click Run and follow the on-screen instructions.

The troubleshooter will automatically reset faulty settings and fix known power configuration issues.

Step 6: Check Wake Timers and Scheduled Tasks

Wake timers allow certain apps or updates to wake your computer from sleep automatically.

Open Settings → System → Power & battery → Additional power settings.
Click Change plan settings next to your current plan.
Select Change advanced power settings.
In the new window, expand Sleep → Allow wake timers.
Set both On battery and Plugged in to Disable.

Click Apply and OK. This prevents scheduled tasks from waking your system unnecessarily.

Step 7: Reset Power Plans to Default

If your system’s power configuration has been altered by third-party software or drivers, resetting to default can often resolve issues.

Open Command Prompt (Admin).
Type the following command and press Enter: powercfg -restoredefaultschemes

This will reset all power plans to their default settings. You can then customize them again under Settings → Power & battery.

Step 8: Scan for System File Corruption

Corrupted system files can prevent Windows from entering or resuming from sleep correctly. You can repair them using SFC and DISM.

Open Command Prompt (Admin).
Run the following commands one at a time: sfc /scannow Once complete, run: DISM /Online /Cleanup-Image /RestoreHealth
After both scans finish, restart your PC.

These tools automatically repair missing or corrupted system files that could affect sleep behavior.

Step 9: Reinstall or Update Your Graphics Driver

Your graphics driver plays a direct role in how Windows handles sleep transitions.

Press Windows + X → Device Manager.
Expand Display adapters.
Right-click your GPU (Intel, AMD, or NVIDIA) and choose Uninstall device.
Restart your PC — Windows will automatically reinstall a basic display driver.

For best performance, reinstall the latest version from your GPU manufacturer’s website after the reboot.

Step 10: Check BIOS or UEFI Power Settings

If none of the Windows fixes work, the issue may originate from your system firmware.

Restart your PC and press F2, Del, or the key shown during startup to enter BIOS/UEFI.
Look for Power Management or Advanced settings.
Ensure that ACPI, S3 Sleep State, or Suspend Mode is enabled.
Save changes and exit BIOS.

After restarting, test if your PC now enters Sleep Mode correctly.

Wrapping Up

When Sleep Mode stops working in Windows 11, it’s usually caused by a background process, device driver, or misconfigured power setting. By checking your sleep timers, disabling wake permissions, updating drivers, and resetting power plans, you can typically fix the issue without reinstalling Windows.

If your PC still refuses to sleep after trying all these steps, check for firmware or BIOS updates from your manufacturer’s website — they often include fixes for power management bugs.

Once everything is configured correctly, your PC should enter and wake from Sleep Mode smoothly, saving energy and time — just like it was designed to.