Question Crashing/Freezing only when downloading/ installing ?

[fearthezest]

Hi, i use to play a lot on windows 7 and i upgraded to windows to play a few more games, all was well besides getting 100% disk usage everytime i was on the computer a while ago, i did some work arounds all seemed fine, normal levels now, but here about 4 months after that issue, i have a new one that has arose, i cant download any game past 75 percent or the computer completely crashes, well i say crashes but it stays on, everything runs, but its stuck in a frozen state of where it crashed, you can see everything but the time and display is all frozen, it never does this while im gaming ONLY on downloads, i can game for almost 8 hours straight with no strain and everything runs fine, but it only messes up on the downloads, i'm not sure what could cause it but i was thinking maybe a hard drive issue, since disk usage was always 100%..

specs: MSI Z170
Geforce 1060 6gb gaming
Corsair CXM 850w bronze
i5-6600k
Corsair Vengeance ddr4-16gb
Seagate HDD 2tb 64mb Cache SATA 6gb/s

 

[rgd1101]

backup your data.
run hdd health test

 

[fearthezest]

backup your data.
run hdd health test

I ran the test and everything says its fine (unless what i run isnt a very reliable source) I was thinking about getting a new HDD anyways but my only concern with this is if I would have to rebut Windows 10 since i upgraded from windows 7 to 10 and it needs a 10 disc. I'm fairly certain its the HDD due to other reasons before this of always being 100 percent disk usage and all..