Can't select in startup options

mlong

Honorable
Jan 21, 2014
1
0
10,510
I'm running Windows 8.1 (just updated). I'm trying to disable the check for a digital signature on installations. I can reach the 'startup Options' page that instructs to select a number of the option you want to change. However, I am unable to select any option on this page, almost like it is locked (I am signed in as the administrator). No matter what number key I push or FN+number key there is not action. Eventually the computer shuts down on it's own because nothing is selected. Thoughts?? Thank you!