People put their PCs or laptops to sleep mode whenever they’re away because it’s a great way to save some battery or power. But sometimes, your computer may wake up from sleep or hibernation on its own, without any user action.
What causes my Windows laptop to wake up from sleep?
Also, some software tends to schedule updates at night or while your computer is in idle mode, which can cause your computer to wake up.
So, to make sure which solution is the best, you first have to determine the cause of your laptop waking up.
You can do that by simply entering a few command lines into the Command Prompt with administrative rights. Here’s what you need to do:
- Press Windows key and X at the same time and select Command Prompt (Admin)
- In the Command Prompt enter the following line and press Enter:
- powercfg – lastwake
This command will give you all the needed information about the last wake of your computer. Under Type you’ll see a cause of waking up. This could be a device, or wake up timer, and we’re going to show you the solution for both below.
SOLVED: Laptop wakes up from sleep by itself
Solution 1 – A device causes your laptop to wake up
If you previously determined that a device forces your computer to wake up, it’s probably your keyboard or mouse. Since we’re talking about laptops, it’s probably an external mouse, because it’s unlikely that touchpad could do this.
But besides the external mouse, network cards could also cause unexpected wake-ups. Either way, you’ll need to prevent this device from waking up your computer. Do do so, follow these steps below:
- Right-click on This PC from Desktop and click on Properties
- Go to Device Manager from the left panel
- Find the device you think is waking your computer up
- Right-click on it and go to Properties
- Under Power Management tab uncheck Allow this device to wake the computer
Prevent hardware from waking up your Windows 10 laptop
This task could also be performed with the Command Prompt. This is a more complex way, but it’s useful if the checkbox for the wake up function is grayed out and you’re unable to uncheck it.
So, access Command Prompt as shown above and enter one of the following lines:
- powercfg -devicedisablewake “[devicename]”
- powercfg -deviceenablewake “[devicename]”
Solution 2 – Disable wake timers
If program wants to schedule a maintenance or apply the newest update, it usually requires from Windows to set a wake up timer for a specific time.
If your computer happens to be in Sleep mode, this timer will automatically wake it up. This might be a useful feature at first, but if you’re away from your computer, it could drain a lot of energy.
To see which timers are turned on, open Command Prompt, and enter this line:
- powercfg -waketimers
If you spot the name of the program whose timer is forcing the computer to wake up, you can open that program and modify the updating routine manually.
But if you can’t spot the program, or there are more than one timers activated, you can deactivate them all at once, just follow these instructions:
- Go to Search, type powercfg.cpl and open Power Options
- Go to Change Plan Settings, and then to Change advanced power settings
- Find Allow Wake timers under Advanced Settings, right-click on it and select Disable
Depending on your OS version, the instructions to follow may be a bit different. Here are the steps to follow on newer Windows 10 versions in order to disable wake timers.
- Open Control Panel and click on Hardware and Sound > Power Options
- Click on Change plan settings > Change advanced power settings
- Expand Sleep and Allow wake timers and disable both “On battery” and “Plugged in”
- Click Apply.
You should know that this process will disable all of your timers. If you have another task that has to wake up your Windows 10 computer, well, it won’t work anymore.
However, this should do the trick and hopefully, your computer will not wake up. This will also work if you have an older OS.
If the problem persists, you can use our exhaustive troubleshooting guide on how to prevent Windows 10 or Windows 8.1 from waking up on its own.
Now you know why your computer wakes up from sleep and how to stop it. If you have any questions, write them down in the comments below.
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Editor’s Note: This post was originally published on July 2015 and has been since updated for freshness, and accuracy.