Hello. I recently purchased a Dell Alienware 17 from a licensed refurbished Dell vendor on eBay earlier this year, and it came with Windows 10 installed (no recovery disk, though I could make one myself). The laptop works fine most of the time, however I occasionally get an immediate blue screen out of nowhere and the error is "UNMOUNTABLE_BOOT_VOLUME". When I get this error, it starts on with the continuous loop of it and the attempt of an auto repair that fails of course, rendering my rig utterly useless until it decided to work again. When it occurs, I just have to power off my computer and wait a few hours/days and then boot it back up with no issues. But this is becoming a pain, and I did not pay over one thousand dollars to play when my computer wants me to play, especially now with the anniversary edition of Windows 10 that I cannot install because I get the error every time I try to update Windows. I've searched online everywhere, and the only help I can find is just to use a recovery disk, but I strongly believe that's not the solution to my problem seeing as Windows functions/boots normally with the exception of this error occurring randomly and when attempting to update Windows. Could it just be a hardware issue with the HDD itself? I've ran diagnoses on everything several times and nothing has appeared corrupted. I need guidance! Please and thank you in advance.