I don't think you can install VeraCrypt, at least for system encryption, unless the installer is signed

According to further up the thread, you can if you disable secureboot.

	▲	pocksuppet 5 hours ago \| parent [-]
		And you mess with your boot.ini and ignore that half your screen is taken up by a TEST MODE banner. Buy a screen twice as big and tape over half of it, I guess.