Windows 10: windows keeps restarting

my computer keeps restarting at random toimes.i have ran a check on my cpu,graphics card,etc,and everything is fine.i was running windows 10 but had to revert back to 8.1 pro.i downloaded the media creation tool bit it always fails.it says this tool cant run on your pc.it dis manage to work once but during the installation my pc restarted itself.i have been trying to fix this for two days now.help!

:)

 

Hard drive/ OS issue

a guy suggested :

• shutdown
• unhooked HDD
• restarted
• yay !!
• reconnected HDD
• restarted
• yay !!

also , try method 3
How do I unlock the drive where Windows 10 is installed?

 

MBR keeps corrupting after restart

I have a machine that when restarted or allowed to go into hibernation, I receive a missing/corrupted master boot record message and Windows doesn't boot. I am able to successfully repair the MBR each time using Windows recovery console, but I'm unable to determine what keeps making it happen.

Dell Latitude E6420
Windows 7 64bit

Steps performed so far: -besides fixing the MBR after each restart or hibernation
-ran system file checker sfc /scannow
-ran chkdsk
-verified that ACHI was enabled in the bios

If I can't figure this out I will end up just reinstalling the operating system, but I worried that the issue with just reoccur later down the line. Any advice/recommendations would be much appreciated.

 

Windows Updated(16299.309).KB4088776 Restart is required to complete.

Hi dalchina. Good news, I followed your suggestion and reinstalled the update and now it appears as "installed correctly" *Biggrin Maybe it was not necessary to run the Windows Update Troubleshooter or maybe if necessary. But using it I do not think it could have worsened something. The installation was very fast, unlike the first time it showed step 1 and step 2 completed.

Thanks for the suggestions and for the time to respond Best regards.


And thanks for the tip of that program, I'll have it on my list.