BSOD occurs every 6 days, error 0x0000000a

The last one was caused by a temp driver called cpuz138_x64.sys, it is only there when you open a program like CPU-Z or Speccy.

For the one before the last it seems there were some problems, thus the one around the time you created this thread. Windows recorded a bad dump file, indicating problems with the memory.

Diagnostic Test

 RAM TEST

Run MemTest86+ to analyse your RAM. MemTest86+ - Test RAM - Windows 7 Forums

   Note

MemTest86+ needs to be run for at least 8 complete passes for conclusive results. Set it running before you go to bed and leave it overnight. We're looking for zero errors here. Even a single error will indicate RAM failure.

Make a photo of the result and post it.

Addition:
If errors show up you can stop the test, remove all sticks but 1 and test this single stick in each slot for 8 passes or until errors show, switch sticks and repeat.
If errors show up and you see them a lot later, no problem, the errors don't affect the test.

It isn't an odd location, unfortunately I've almost forgotten the reason why this driver is in the Windows temp folder so I can't explain

What you could do is simply clear the temp folder, best is after a reboot to ensure not too much is being used.

Make a photo of the result and post it.

I doubt you did this

How did you install a MemTest86 + C/D remotely?

Was unable to set the BIOS to boot from a USB stick.

That happens to many users, the reason is that some settings in the BIOS need to be changed. Unfortunately this is with every motherboard different.