I'm not seeing much, you are indeed correct about ntfs.sys.
Although I don't think hardware is the case personally, there's always a possibility but I think it's a driver that we can't find...
0x50 bugchecks indicate a page fault has occurred in the non-paged pool. (It's in the name), I could go into detail but that's another matter.
Well you can run some hardware tests to see if your HDD or RAM is failing.
Memtest86 will test your RAM
Information
Run Memtest86 for at least 8 passes so we get enough information to confirm that your RAM isn't failing
Run a Disk Check to scan for errors
Note
Afterwards go into an Elevated Command Prompt (Run as administrator) and type in sfc /scannow
If it finds errors reboot and run the scan two more times
Run SeaTools to see if your HDD or SSD is failing
Afterwards if no errors show up and everything looks good then follow these instructions to set your BSOD dump files to
Kernel Memory Dumps.
http://www.sevenforums.com/tutorials/174459-dump-files-configure-windows-create-bsod.html
Afterwards restart your PC and wait for another BSOD, once you get one copy the file created in this directory to the desktop:
C:/Windows/memory.dmp
Upload that file to a website like
OneDrive then post the download link.