Out of nowhere one day the disk usage on my Dell Inspiron G5 5587 with windows 10 skyrocketed to 100%. Instead of getting another drive immediately, I first decided to try a complete reset to see if it did anything. I reset it, and it booted up with one single login option (Other User), which was unresponsive for all combinations of usernames and passwords. I then booted in safe mode to access the administrator profile, and found that the desktop did not exist or could not be accessed. I tried and was unable to manually create a desktop folder. I found that explorer.exe and other programs were "tokens" that "did not exist." I tried running system file checker to see if anything was awry, but it found nothing. I tried reverting to an earlier version of windows, but the system would not let me. I have tried to repair corrupted files manually via command prompt, but to no avail. I even went so far as to reset again (nada). Everything I did was done with admin privileges. I only have access to the command prompt and troubleshooting options. I am at my wit's end. It's as if the laptop has given itself the computer equivalent of a lobotomy, and rendered itself little more than an oblong coaster with some circuity attached. Any and all insight would be appreciated.