Windows 10 reboots once on startup everyday


My windows 10 pc has developed an annoying habit of rebooting once every day on startup.
When turn my pc on it loads to the login screen then before i even type a password it reboots just once. It will then return to the login screen and will operate fine until i next power off fully at which point the behaviour is repeated.

I've had a look through the event logs but i don't see anything that explains the behaviour. i do have a few events stating the previous system shutdown was unexpected but no BSOD or mini dump file is created and nothing else in the logs indicates there has been a problem.

Any advice on what might be causing this would be great thanks
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David SankovskySenior SysAdminCommented:
My first thought would be that it's related to windows updates. Try going into settings, update and security, windows update, advanced options and changing the "Choose how updates are installed" to " notify to schedule restart" so it doesn't just restart whenever it wants after performing updates.

Also, in very, Very, VERY rare occasions, it could be related to faulty EFI hardware tables in your CMOS, if updates didn't fix your problem, you could try and clear your CMOS - but only use that as a last resort.
JohnBusiness Consultant (Owner)Commented:
1. Update BIOS, Chipset, Video and Power Management drivers from your manufacturer.
2. Open cmd.exe with Run as Administrator and run dism.exe /online /cleanup-image /restorehealth

Restart after these two steps and test again.

If you still have problems, run a non-destructive Repair Install and keep everything.

Go to the Media Creation Link

Windows 10 is running, so click on the Download button (not Upgrade Button, select Open (Run) but NOT Save. Allow the program to run. Allow drivers to update. Then select Keep Everything.

Updates do not cause this issue on my own or client computers.
Hello ThereSystem AdministratorCommented:
Enter Safe mode. What happens?
Run Windows 10 in Diagnostic Mode. What happens?
Unplug external devices and perform Clean Boot to see if any third party applications or startup items are causing the issue.

Try to disable "Fast Startup" in the shutdown options of the Power Options menu.
Start -> Settings -> System then select Power & Sleep and scroll to the bottom and pick Additional Power settings, this opens the Power Options menu. Now select "Choose what the power buttons do" and then "Change settings that are currently unavailable". Scroll to the bottom and under Shutdown Settings untick "Turn on fast startup (recommended)".

Also try this if nothing above helps.
Press shift +  Restart.  After your PC restarts to the Choose an option screen, select "Advanced options" and then "Troubleshoot". Select "Advanced options" and then select "Command Prompt". Then type:
bootrec /fixMBR
bootrec /Fixboot
bootrec /rebuildBCD

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Tom CieslikIT EngineerCommented:
It looks like some unfinished update is trying to make some changes in your computer but it can't succeed so is reverting changes, but in next restart is trying again.

TO make sure this is update related issue, disable Windows update service and restart computer.
Check if computer will repeat issue.
If not then you need to find update that cause problem.
Check Windows Application Event log for any errors since booting, this will help you investigate
Verify if this is a problem with fast startup: simply keep the shift key pressed while you click on the shutdown button and then turn it on again and see if it behaves - if that makes a difference, you have found the root cause.
Z1ggyAuthor Commented:
Disabling fast startup seems to have solved it !
Cheers guys
I usually read any other comment... sorry "Hello there" for missing that you recommended the same before.
Hello ThereSystem AdministratorCommented:
I am glad I could help.
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