checked disk, ran a CHKDSK no errors, ran a disk check from win10 also all good.
Note that if you want to test your RAM you would download
memtest86 and make a ISO image of it to boot from.
On Windows it is even easier to test your memory, you just click on the Search magnifying glass at the bottom left and type "Windows Memory Diagnostic" or "mdsched.exe" and launch the resulting program that appears. Then you can either tell it to restart immediately or wait until the next restart to run the memory test.
Some Linux live DVDs already have memtest86 and display a Test Memory entry in the boot menu so you can just use that instead if you have one lying around.