It's much more useful to provice the information from the blue screen, to begin with the error code (like 0x0000007C) and the module in which it occurs.
Usually, it's either hardware related (power supply, heat, bad hard disk, bad RAM) or some very bad program you downloaded.
PC (spec below) is dying. I've had the blue screen of death and the black one and the technicolour one. It freezes or it tries to restart of its own accord. I'm game for trying to fix it but where on Earth do I start in order to identify the cause?
Just before problems began I hadn't made any changes like new software or drivers etc. I MIGHT have done a Windows Update but (mea culpa) I don't keep track of those. Interestingly for we conspiracy theorists, the very first death event occured the same day as I declined the Windows10 update!
My limited investigations thus far have produced two possibilities. The Windows Repair Utility says there "might have been an unidentified change to the configuration" (yeah, thanks Windows) and some timid inspection of the Event Viewer threw up a load of error codes and event IDs of which this was the most recent:
Event ID 41
Version 2
Level 1
Task 63
Op code 0
Execution process ID 4
Execution process ID 8
Channel - System
Keywords 0x8000000000000002
Event record ID 2410331
(Why all that? Wouldn't an English explanation be more useful?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic