Edit: The issue was solved by using a bootable Windows 10 pen drive. Using this drive, I performed a system restore... and bam!
So, my Windows 10 is really pitching a fit! This all started when I had to force shut down my Windows 10 machine using the power button, because of a total system hang. Then, I turned the machine back on. But NVDA did not come back to life. I tried turning on Narrator, and it wouldn't talk.
So I asked my dad to come and look at my screen. According to him, although the lock screen wall paper was there, even when I pressed keys on the keyboard, the log in box wouldn't appear.
I've tried ctrl alt del, I’ve tried rebooting, nothing works. Any help would be greatly appreciated.
from The Book of Mozilla, 11:14