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.
- Troubleshoot Power
Type troubleshoot in Cortana Search > Click Troubleshoot > Scroll down > Click Power > Run the troubleshooter > Follow on-screen direction.
- 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
- 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
- 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
- Run Built-in & Guided Walk through Windows Update troubleshooter
Built-in : Windows Key+X > Click Settings > Click Update & security > Click Troubleshoot > Click Windows Update > Click Run the Troubleshooter
Guided Walk though - https://support.microsoft.com/en-us/help/10164/...
- Run SFC Scan & DISM
How to - https://answers.microsoft.com/thread/bc609315-d...
- Would you like to update to 1809 which fixes many things. (You can always revert back to previous version within 10 days, if you don't like)
You should upgrade to 1809 manually to have a successful upgrade. To upgrade to 1809, you should do following -
A. Take a backup of your computer before you proceed.
B. Uninstall any third party Antivirus (After update is successful, you can install it again)
C. You can go to https://www.microsoft.com/en-us/software-downlo...
You can press Update Now
If update now is not successful, then best method is manual method which is below.
You can download the latest Windows 10 package from this link (media creation tool) and follow the instructions there to upgrade. Use the very simple instructions given under Using this tool to upgrade this PC to Windows 10