Random Black Screen/Shutdown

[Arran_Juty]

My PC locks up sometimes.
The keyboard lighting goes off and then becomes unresponsive.
Then shortly after the computer just dies.
It happened when I played Watch_Dogs for 2 hours and then after closing the game I opened a browser and left for 2 minutes. Then when I come back i move the mouse and the whole PC locks up and dies.
It also happened during a game of Payday 2 when I plugged in and unplugged a speaker to the front header.
All issues appear to be caused by the front header but after a BIOS update I appear to have fixed it.

System Information
------------------
Time of this report: 3/20/2016, 16:14:11
Machine name: DESKTOP-5DQSNQB
Operating System: Windows 10 Pro 64-bit (10.0, Build 10586) (10586.th2_release_sec.160223-1728)
Language: English (Regional Setting: English)
System Manufacturer: MSI
System Model: MS-7850
BIOS: V4.11
Processor: Intel(R) Core(TM) i5-4690K CPU @ 3.50GHz (4 CPUs), ~3.5GHz
Memory: 8192MB RAM
Available OS Memory: 8140MB RAM
Page File: 6491MB used, 3825MB available
Windows Dir: C:\Windows
DirectX Version: 12
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
Miracast: Available, with HDCP
Microsoft Graphics Hybrid: Not Supported
DxDiag Version: 10.00.10586.0000 64bit Unicode

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DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Input Tab: No problems found.

Does anybody know whether it's just these two poorly optimised and buggy games or my PC?
Thanks

 

[Guest]

This is most likely a weak or faulty power supply. What model do you use?

 

[Rinatus]

This is most likely a weak or faulty power supply. What model do you use?

Hey there, just a question for you, I have a toshiba that locks and shuts down (Restarts after a while by itself) when under heavy load or after a while. Could the power supply be my problem too? (Happens both on battery and connected)

 

[Guest]

I am sorry for not replying. To both of you guys, it's quite likely to be a bad power supply, but it's also possible to be a case of overheating parts and the computer turning off to avoid damage.