Computer is freezing without BSOD's, forcing me to manually restart it

Hi, thanks for helping me out. I have tried
1. I have reinstalled Windows, and i have installed only a couple of programs on my newly fresh installation of Windows. I have also installed Kaspersky (Trial version for 30 days) just test it with another AV program. Also the Malwarebytes is installed too, and he found some errors and possible Trojans which it cleaned yesterday. Computer worked normaly for almost a 24h shift and then freezed 2 times in 10min - in a Steam game "DOTA 2"
2. a) Monitoring my GPU temps, they're <35°C idle, <76°C in Furmark stress test with Xtreme Burning Mode. I have tested it for 5 minutes and temps didnt go higher than 75-76°C. I know that 5 minutes is not enough, but im sure that i can't achieve over that temperatures with game that i play and that is DOTA 2. Today my computer froze 2 times in 10min while i was playing it.
2. b) I have stress tested my CPU with Prime95 for over 10 minutes. Again i know that is not enough but im kinda impatient and afraid to overstress my system with those tasks... My idle CPU temps are 28°C, and 65°C in Prime95. Computer didn't froze neither on GPU or CPU stress test
3. I have also scanned system file with that command: sfc /scannow. Everything seems to be fine
4. Disk check also didn't find any problems on any of my disks/partitions.

I guess im having a hardware issue, more than a software one

Here are the new files


EDIT: I was testing my CPU with Prime95 for half hour, still the same temperatures with no freezing

Hello, let's start testing your hardware. First, run memtest86+ for 7 passes or until you get errors. It will take quite a few hours, so best to run it overnight. You have to have a lot of patience testing hardware, it takes a long time. Also, if you are overclocking anythind, please stop. Set BIOS to optimized defaults, and set the sata controller to the mode you want (IDE or AHCI) and set the boot order with DVD/CD drive 1st and hard drive 2nd for right now., save and exit.

Did you install any new hardware or software immediately before beginning to get the freezing problem?