Please start with these free hardware diagnostics: http://www.carrona.org/hwdiag.html
I see that you've already run MemTest and the Intel CPU diagnostics - but please run the rest of the tests.
If you didn't run 3 full passes in MemTest, then please do that.
The Crystal Mark and HDTune are nice programs, but nothing beats the manufacturer's diagnostics on HDD's (there are no good diagnostics for SSD AFAIK) - so please run either the Western Digital or Seagate Seatools diagnostics on the W-D HDD.
Do the video tests last - as you've already tried another GPU (there's still a possibility of problems showing up - so don't skip them please).
There are no memory dumps in the uploaded reports (but there is a large dump in C:\Windows). Please do this:
Upload Dump Files:
NOTE: If using a disk cleaning utility, please stop using it while we are troubleshooting your issues.
Please go to C:\Windows\Minidump and zip up the contents of the folder. Then upload/attach the .zip file with your next post.
Left click on the first minidump file.
Hold down the "Shift" key and left click on the last minidump file.
Right click on the blue highlighted area and select "Send to"
Select "Compressed (zipped) folder" and note where the folder is saved.
Upload that .zip file with your next post.
If you have issues with "Access Denied" errors, try copying the files to your desktop and zipping them up from there. If it still won't let you zip them up, post back for further advice.
If you don't have anything in that folder, please check in C:\Windows for a file named MEMORY.DMP. If you find it, zip it up and upload it to a free file hosting service. Then post the link to it in your topic so that we can download it.
Also, search your entire hard drive for files ending in .dmp, .mdmp, and .hdmp. Zip up any that you find and upload them with your next post.
Then, follow the directions here to set your system for Minidumps (much smaller than the MEMORY.DMP file): http://www.carrona.org/setmini.html
More info on dump file options here: http://support.microsoft.com/kb/254649
Your UEFI/BIOS (version 1.20) dates from 2016. Please check at the manufacturer's website to see if there are any UEFI/BIOS updates available for your system. This is just in case there has been a more recent update.
FYI - W8 and W10 communicate more with the UEFI/BIOS than previous versions of Windows, so it's important to ensure that the UEFI/BIOS is kept up to date (and that outdated UEFI/BIOS' may be the cause of some compatibility issues).
Although you appear to have a reasonable number of Windows Update hotfixes for this version of your OS, please double check for any new Windows Updates. It only takes one update to cause a problem, so it's essential that you have all of them. The actual number is not important. Rather it's important that you checked manually, installed any available updates, and didn't experience any errors when checking or updating.
You have these problems in Device Manager:
Standard PS/2 Keyboard ACPI\PNP0303\0 This device is not present, is not working properly, or does not have all its drivers installed.
Microsoft PS/2 Mouse ACPI\PNP0F03\0 This device is not present, is not working properly, or does not have all its drivers installed.
Not Available ROOT\USBKCXTRLER\0000 The drivers for this device are not installed.
For the first 2 errors, they are safe to ignore if you're using a USB mouse and keyboard
The last error relates to some sort of USB device from Fintek: http://www.fintek.com.tw/index.php
Please either download/install drivers for it - or physically remove the device from your system.
Beyond that, I don't see any significant errors in the reports.
This makes a hardware problem more likely - so please complete the hardware diagnostics that I suggested earlier.
If that doesn't find anything, then run Driver Verifier according to these instructions: http://www.carrona.org/verifier.html and let it crash 3 times (if it doesn't crash in 36 hours, move on to the next step after turning it off)
The next step is a stripdown to help isolate the problem device(s): http://www.carrona.org/strpdown.html