BSOD on startup screen, error 0x0000009c

i built a computer for a friend about a year ago. he's not a power user - uses it to play pubg and use photoshop, and that's about it. he recently started getting machine check exception BSODs, so i came over to check it out. the system freezes for a few seconds randomly and then BSODs with a machine_check_exception error. i had him confirm systemps (they appeared normal) and so i went over to check it out. i corrected a few wonky drivers that were acting up (nothing big) but couldn't ID anything really bad. suddenly it started locking up with a new error - clock_watchdog_exception - and now it wouldn't progress past the startup screen. safe mode and safe mode with networking worked fine and didn't throw errors, but booting into normal mode would throw the clock_watchdog error.

i've attached outputs from driverview, bsodview, and the dump tool your forums use. i also uploaded the last seven minidumps that windows created to this location. the two most recent are the clock_watchdog errors, and the prior ones are the machine_check errors.

any ideas? i'm guessing it's integration with his razor headphones and/or keyboard, but i can't confirm. i haven't yet replicated the errors at my house (brought his computer home last night) so i haven't isolated them yet.

edit: it just threw a clock_watchdog now, so it's not related to his peripherals. it appears that the BSOD data collection screen is freezing too, but i'll give it some time to identify for sure if that's happening.

Windows was inactivated retail, so I am guessing it was for Office or something. I asked him but he supposedly didn't know.

I updated the BIOS and drivers but it was still happening, so I reinstalled Windows (again inactivated retail W10). I did this because it was rock solid in safe mode and totally unstable otherwise. After reinstalling, I didn't see a BSOD for 4+ hours, so I gave it back. That was Friday night. Saturday night he got another BSOD. I had him export the results of the tool and uploaded them at DESKTOP-SFEPM1D-Sun_03_04_2018_101446_57.zip - Google Drive. Thoughts?

build is as follows:
cpu: i5-7600k
gpu: msi 1070 quicksilver 8gb
mobo: z270 killer sli/ac
ram: GEiL evo x 2x8gb ddr4 3000
psu: evga g3 750w
ssd: samsung 960 m.2
hdd: toshiba p300
others: corsair h50 closed loop, razor keyboard, g500 mouse

nice machine when it isn't exploding.

i've got driver verifier set up with the settings you requested and running, and it's sitting and hanging out. he's been getting the bad_module_info error that pubg and fortnite's been getting since the fall windows update but that's it so far.

when i went to bed last night it had been running pubg for 8hrs without issue, but i woke up to a frozen bsod screen at 95% log generation (i disabled auto-restart after error). i restarted it a few times and got the clock_watchdog error a few times before it actually generated logs properly and didn't freeze mid-generation. here's the output from your site's tool run in safe mode - DESKTOP-SFEPM1D-Mon_03_05_2018__71711_31.zip - Google Drive

let me know what else you need.

sorry, i was posting via mobile and couldn't figure out how to upload it. i'll do it from the desktop next time.

i'll set up memtest tonight and get results to you asap.