If you have trouble figuring out which device is the problem, remove all your USB devices the next time you put your computer to sleep, and see if it wakes up on its own. I’d bet dollars to donuts it's your mouse or keyboard-maybe your cat thinks it's a fun toy when you aren’t looking-but it could be anything. If Windows tells you a USB device is waking your computer, you’ll have to find the offending device. In the sidebar, head to Windows Logs > System, then click the Filter Current Log button on the right side of the window. Click the Start menu, search for 'Event Viewer,' and launch the tool. I’ve also had luck searching Windows’ Event Viewer for information. If that command didn’t give you useful information, try this one: powercfg -waketimers In other cases, it may list a specific hardware device, and you can skip down to the relevant section in this article, or do some extra Googling on what settings to change on that device. In that case, your search is over, and you can adjust that program’s settings or uninstall it to stop the problem. For example, the last time my workstation woke up, it was due to my cloud backup program running its scheduled backup for the evening. If you’re lucky, it’ll give you a pretty clear answer. Type the following command and press Enter: powercfg -lastwake Windows knows what woke up your computer most recently, so the next time it wakes up unexpectedly, open the Start menu and search for “cmd,” then right-click the Command Prompt and choose Run As Administrator. How to Set Up Two-Factor Authentication.How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.

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Windows 10 will not go into sleep mode