You have a computer that runs Windows 10.
You can start the computer but cannot sign in.
You need to start the computer into the Windows Recovery Environment (WinRE).
What should you do
A. Turn off the computer. Turn on the computer, and then press F8.
B. Turn off the computer. Turn on the computer, and then press F10.
C. From the sign-in screen, hold the Shift key, and then click Restart.
D. Hold Alt+Ctrl+Delete for 10 seconds.