Ashwin Lewis
If your Windows PC randomly wakes up from sleep mode, there are several ways to diagnose and fix the problem. First, you need to determine the root cause of the issue. This can be done by using the Command Prompt tool on Windows and running the command powercfg -lastwake to identify the main factor that woke up your PC from sleep mode. Once you have identified the cause, you can try various solutions to prevent your PC from waking up randomly. These solutions include disabling wake timers, changing active hours for Windows updates, updating the Windows version, and disabling specific devices from waking up the PC.
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What You'll Learn
Identify what's waking your PC up from sleep
If your Windows PC wakes up from sleep mode, there are a few ways to identify the source of the issue. Firstly, you can check the wake history by using the Command Prompt tool. To do this, search for "cmd" in the Windows Search bar, right-click on the Command Prompt listing, and select "Run as administrator". Then, type "powercfg -lastwake" and press Enter. This will show you what woke up your computer last.
Additionally, you can use the POWERCFG command in the Windows Terminal to find out what woke your PC from sleep mode. Right-click on the Start Menu and select "Windows Terminal (Admin)". In the Terminal, type or paste the following command and press Enter: "powercfg /waketimers". This will display a list of applications that can wake up your PC.
You can also check the Power Management settings for your devices. Open the Device Manager by right-clicking on the Windows logo and selecting it from the context menu. Find the device you want to check and double-click on it to open its Properties window. Click on the Power Management tab and review the "Allow this device to wake up the computer" setting.
Another possible cause could be a USB device, such as a mouse or keyboard. To identify if this is the issue, remove all USB devices and see if the computer still wakes up from sleep. If it doesn't, reconnect the devices one by one to identify the offending device.
Furthermore, network connections, scheduled tasks, and background wake timers can also be responsible for waking your PC. To manage these, open the Start menu, search for "Edit Power Plan", and click on "Change Advanced Settings". Go to Sleep and disable "Allow Wake Timers" for both "Battery" and "Plugged In". Repeat this process for all power plans.
By following these steps, you should be able to identify and address the issues causing your Windows PC to wake up from sleep mode.
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Disable wake timers
If your Windows PC wakes up from sleep mode, you may have a task or application that is waking it automatically. To fix this, you can disable the wake timers.
To disable the wake timers, open the Start menu and search for "Edit Power Plan". Click on "Change advanced settings" in the Edit Plan Settings window. Head to Sleep > Allow Wake Timers and change Battery and Plugged In to Disabled. Repeat this process for all power plans in the drop-down menu.
You can also try disabling specific devices from waking up your computer. To do this, open the Start menu and search for "Device Manager". Find the device in the resulting list and right-click on it. Select Properties and the Power Management tab, then uncheck the "Allow this device to wake the computer" option and click OK.
If you are using Windows 10, you can also try disabling the "Enabling Windows Update Power Management" setting in the Group Policy Editor. Go to Control Panel > Automatic Maintenance and disable "Allow scheduled maintenance to wake my computer". Change the time to sometime during the day, such as 4:00 pm or 5:00 pm, to prevent your computer from waking up in the middle of the night.
Additionally, you can open an Administrative PowerShell command prompt and run a command to remove the permission for all tasks to wake your computer. Press Windows Key + X to open the Win + X menu and choose Command Prompt (Admin) from the list. You can also open PowerShell by searching for it in the Start menu and pressing Ctrl+Shift+Enter. Place the following command in the window:
Get-ScheduledTask | where {$_.settings.waketorun}
This will return a list of tasks that can wake up your PC. Go through each task and remove their permission to wake your computer.
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Change active hours for Windows updates
One of the ways to fix Windows randomly waking up from sleep mode is to change active hours for Windows updates. This feature allows you to set a time period during which you are actively using your computer, and Windows will avoid automatically restarting your computer during this time to install updates. This can be done by following these steps:
- Go to the Start menu.
- Select Settings.
- Choose Update & Security.
- Select Windows Update.
- Click on Change active hours.
- Set the start and end times for your active hours.
- Save the changes.
Additionally, you can turn on the "Automatically adjust active hours for this device based on activity" setting, which will allow Windows to learn your device usage patterns and adjust the active hours accordingly.
By changing the active hours, you can prevent unexpected restarts and ensure that your computer installs updates at a convenient time for you.
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Update Windows version
Updating your Windows version can help keep your device running smoothly and securely. Here are the steps you can follow to update your Windows version:
For Windows 11:
- Select the Start button, then go to Settings > Windows Update.
- Select Check for Windows updates.
- If any updates are available, select Download & Install.
- If prompted, restart your device to apply the updates.
- You can also choose to get Windows updates automatically as soon as they become available for your device. This option is useful to prevent inconvenient installs and restarts when you are actively using your device.
- If you are experiencing issues with updates, you can refer to the "Troubleshoot problems updating Windows" guide on the Microsoft Support website.
For Windows 10:
- Select the Start button, then go to Settings > Update & Security > Windows Update.
- Select Check for updates.
- If any updates are available, select Download & Install.
- If prompted, restart your device to apply the updates.
- You can also pause updates for up to 7 days or specify a date for updates to resume.
- If you are having trouble installing updates, you can refer to the troubleshooting guide on the Microsoft Support website.
General Tips:
- It is recommended to keep your device connected to the internet and ensure sufficient hard drive space to facilitate the update process.
- You can also use the Windows Update Tool to check for new updates and install optional new features.
- Windows periodically checks for updates and installs them automatically. However, you can still use the Windows Update feature to check for any updates that may have been released since the last automatic check.
- Quality updates are more frequent and usually include small fixes, security updates, and occasionally new features.
- Feature updates are typically released annually and include significant changes, new functionalities, and security enhancements.
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Check your USB devices
If your Windows computer randomly wakes up from sleep mode, it may be caused by a USB device. To identify the offending device, you can try the following steps:
First, the next time you put your computer to sleep, remove all your USB devices and observe if it wakes up on its own. If it doesn't, this indicates that one of the USB devices you unplugged was the cause of the issue. To pinpoint the exact device, you can then try plugging in one device at a time and putting the computer to sleep after each device is connected. Continue this process until you find the device responsible for waking up your computer.
Once you've identified the problematic USB device, you can try addressing the issue by opening the Start menu and searching for "Device Manager". From there, you can double-click on the device, select the Power Management tab, and uncheck the "Allow this device to wake the computer" option. This should prevent the specific USB device from waking up your computer.
If you're unable to identify the exact USB device causing the issue or if the problem persists after disabling the "Allow this device to wake the computer" option, you can try a more comprehensive approach. Open the Start menu, search for "Edit Power Plan," and click on "Change Advanced Settings." Navigate to the Sleep section and disable "Allow Wake Timers" for both Battery and Plugged In settings. This will prevent your computer from waking up due to any USB device or scheduled events.
Additionally, you can use the Command Prompt to identify and manage wake-up settings. Open the Command Prompt with administrative rights and enter the command "powercfg -devicequery wake_armed" to determine which devices can wake up your computer. You can then use specific commands to prevent certain devices from waking up your computer.
By following these steps, you should be able to effectively address the issue of your Windows computer randomly waking up from sleep mode due to USB devices.
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Frequently asked questions
There are a few things you can try to fix this issue:
- Check if a USB device is waking your computer.
- Disable wake timers from the Control Panel.
- Change active hours for Windows updates.
- Update your graphics card driver.
- Check your power settings and disable "Allow wake timers".
Remove all USB devices before putting your computer to sleep. If it stays asleep, it's likely that one of the devices you removed is the cause. To find the offending device, plug in one device at a time and put your computer to sleep after each device.
Go to the Start menu, search for "Edit Power Plan", and click on "Change advanced power settings". Then, go to Sleep and disable "Allow wake timers".
Go to Settings > Windows Update > Advanced > Active Hours. Here, you can change the times when your computer installs updates.
Visit the support site of your graphics card manufacturer. Download and install the latest driver that is compatible with your system and OS.
Go to Power & Sleep Settings > Additional power settings > Change plan settings > Change advanced power settings. Then, disable "Allow wake timers" under Sleep.
You can use the Command Prompt tool to identify the main factor. Type "powercfg -lastwake" in the Command Prompt window and press Enter.
