Windows 10: Event viewer: Boot manager is corrupt / Random Freezes and then reboot

My desktop computer is always crashing randomly with a buzzing sound before rebooting automatically. Sometimes it won't show image when rebooting ex. No signal or a black screen and I would have to try several times in order for the display to show image. I tried many solutions such as formatting, checking for errors with cmd and updating drivers. I also saw a solution that suggested to do a startup repair or fix mbr with cmd on safe mode but when I press to go on safe mode with cmd or do a startup repair I end up on a black screen with nothing making me restart the pc again. This is so frustrating cause I'm searching a solution for years.

:)

 

Random freezes or shut downs

Completely random freezing/shutdowns on a system with no recent hardware changes, and hard drive, memory, and PSU fine, usually means a software issue (file corruption or malicious software). I suggest following DavidV's recommendations.

 

Random Reboots

I've had, as the title suggests, random reboots for the length of the time since I've built my computer (2 years roughly) and they're completely inexplicable.

It happens under no load, high load, watching movies, listening to music, playing games, browsing the web, sitting by itself in the room when the my sleeping monitor is even saying WTF?!

There aren't any Events to view other than the usual 0xC*D event when the service just shrugs at me.

Any thoughts or suggestions? Maybe someone has had the same problem before and it was just a loose molex connection? I'm baffled.

 

Event Viewer problem with latest Windows Build 1607

After installing the new Windows build 1607, the Event Viewer stopped recording events under Diagnostic Performance. (Before 1607 I checked the files located under Windows.old dated 9/23/2016 and located this file which indeed did have a list of events
recorded.)

Since the initial 1607 download there have been two new builds automatically installed on my laptop.



The last step in an automatic download is the RESTART. Prior to my rebooting, I checked the Diagnostic Performance and for sure, these had the list of events.



Rebooting by me, causes the Diagnostic Performance errors to disappear.

As suggested earlier I have run the SFC/DISM commands with no errors reported.

Any Ideas?

Nancy