Windows 10 reboots itself without any warning, but just once

rebootwindows 10

I'm facing a weird issue on my Windows 10 PC. Last weekend I reinstalled Windows to rollback from the latest Windows Insider build, so I didn't format all the drive but just did a fresh Windows installation. Since then, every time I power up the PC, it restarts itself without any previous warning within a couple of minutes — just black screen and motherboard logo again. It could appear as an hardware issue, like a classical overheating or faulty RAM issue, but the curious fact is that once it rebooted then it goes on for hours without any further problem. Moreover, again, this strange behaviour only started since the reinstallation of Windows. Is there something I can do to track down the issue?

My specs:

  • ASRock Z77-pro4 Motherboard
  • CPU Intel Core i5-3450
  • NVidia GTX 680 4gb
  • 32gb (4x8gb) DDR3 Kingston
  • Samsung SSD 850 EVO 1TB (Main HDD)
  • Seagate ST1000DM003-9YN162 (Backup drive)

Thanks for any suggestion!

Best Answer

By googling around I found this post in which an user suggested to disable Fast Boot in Windows 10. I did so just to try, and I have to admit I've not had a reboot since then, and some days are passed already. Here are the steps to disable Fast Boot (or Hybrid Shutdown, as he calls it), but you can find them by just follow the link on the post I already linked here. They're written for Windows 8 applies to 10 as well:

  1. Log on to Windows 8 computer with the administrator account on which Hybrid shutdown is to be disabled.
  2. Click Desktop tile from the Start screen to go to the desktop screen.
  3. Once on the desktop screen, hover mouse to the bottom right corner of the window.
  4. From the displayed options, click Settings.
  5. On the Settings pane, click Control Panel.
  6. On the opened Control Panel window, click System and Security.
  7. On the System and Security window, click Power Options from the right pane.
  8. On the Power Options window, click Choose what the power buttons do option from the left pane.
  9. On the System Settings window, click Change settings that are currently unavailable link to enable the advanced options.
  10. From the enabled options under Shutdown settings section, uncheck Turn on fast startup (recommended) checkbox to disable Hybrid Shutdown.

Click Save changes button to save the modified settings. Close Power Options window when done.

Note: In order to re-enable the Hybrid Shutdown in Windows 8 computer follow steps 1 to 9. On the step 10, check the Turn on fast startup (recommended) checkbox and save the changes.

So, as it seems, it was a software issue, not an hardware one.

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