Random freeze and crash when doing something heavier

Hello!

I've ran into this problem some time ago. It first started when I installed Windows 10 (back in 2015, when my PC was quite new). It used to commonly freeze the whole system, make it unresponsive to anything (even the restart button, a hard shut down was needed). Then I clean installed Windows 10 again, the problem seemed to have become a rare one. It used to crash like once in two weeks. Recently it became much more common. Let me give you some examples. Let's say I'm playing good ol' Fortnite with my friends and talking through discord. Yesterday I played for 2-3 hours and no crash. Today it happened almost every match and I got annoyed so that's why I'm making this post. But let's say for example I'm playing Bioshock Infinite on max settings and there is NO crash whatsoever. It just happens so randomly. Things that I've tried are:

* Messing around in the power settings (turning off quick start-up and so on...)
* Running various commands (SFC, chkdsk...)
* Changing some values in the registries (The Start value for example)
* Resetting the PC
* Updating drivers (the OS itself is up-to-date)
* Checking for malware

My specs are:

* 8 GB RAM
* Intel i5-4690 3.5 GHz
* Nvidia GeForce GTX 760
* 120 Samsung SSD (on which the OS is installed)
* 1 TB HDD

The problem has been annoying me recently very much and I'd like to know if anyone has had any experience with this or know a fix. Thank You in advance!

I agree with where Masterchiefxx17 is going, it sounds to me like an unstable overclock... On a stock machine it could simply be a not getting enough voltage. I would comb thru the BIOS and I bet your answer is in there...