I disabled the Intel graphics driver on my PC thinking it would default to my NVidia 680 driver and card, but it didn't. How can I recover from this given that I can't now get any monitor to work with it (I've tried three).
Start your System, then just after the Manufacturers logo disappears and Windows 10 tries to boot, press and hold the power button down for 5 - 10 seconds to perform a hard shut down
Do this Twice
On the third boot attempt, Windows will boot into the Windows 10 Repair Environment, from there you can access Startup Recovery, Safe Mode, Command Prompt . . . etc.
Go to Troubleshoot - Advanced Options - Startup Settings, click restart.
Upon restart press 4 to boot into Safe Mode - you should be able to re-enable your Intel HD Graphics from inside Safe Mode.
Please Note: if you have a Intel HD Graphics as well as a dedicated nVidia GPU, on the nVidia card look for Optimus settings, If you turn off Optimus, your system will use the nVidia card by default and ignore the Intel HD Integrated Graphics