There can be several causes but to start with, you can try following. Please try these options one by one and check after each option.
1. Troubleshoot Power
Type troubleshoot in Cortana Search > Click Troubleshoot > Scroll down > Click Power > Run the troubleshooter > Follow on-screen direction.
2. Restore Default for Power Settings
Windows Key+I > System > Power & sleep > Click Additional power settings to open Power options > Click Change Plan Settings > Click Restore default settings for this plan
3. Disable Fast Startup
Reach to Power options as in previous step > Click Choose what the power buttons do > Click Change settings that are currently unavailable > Scroll down to Shutdown settings and uncheck Turn on fast startup > Click Save changes
4. Uninstall / Install Battery Driver (Only for laptops)
Shut down your computer > Detach power chord > Remove battery (if fixed no need to remove) > Attach power chord > Reboot your computer
Windows Key+X > Device Manager > Expand Batteries > Right-click Microsoft ACPI-Compliant System > Uninstall > Shutdown the computer > Remove the power chord > Attach your battery > Attach your power chord > Reboot the computer to automatically install the driver
5. I would recommend that you perform a Windows 10 repair upgrade. Repair upgrade fixes all Windows errors and retains all files, applications and settings. (You will not lose any data while backup is a good idea) Below is a good guide to perform repair upgrade
https://www.tenforums.com/tutorials/16397-repai...
Disclaimer - This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
