I literally just tapped buttons after a point.
For other Nextbook efmw101t users it'll be a **** shoot. First, there is a way to get into the BIOS, but again, it's a **** shoot.
Turn the system off. Then hold down the power button and the center of the volume control until you get to a blue screen. On the page it's say to hit the windows key to proceed. It didn't work for me. I finally got frustrated and ran my finger down the line from Ctrl to the spacebar. That brought me to a menu (6 tiles) where I could go into the bios, boot manager, etc.
With a Nextbookrecovery.rar file I found and decompressed on a flash drive from mediafire.com I chose the boot from file option. There's a config file there. That file finally got me to the recovery menu. I was trying for a reset. It froze during the process several times, but after 10 or so tries I finally got Windows 8.1 back.
The bad news is that the screen orientation sensor will be screwed up. You'll have to lock it into place until you can find the proper drivers.