can't set up windows on boot camp, keyboard not working.
I've gone through the bootcamp process, got everything on a USB etc... but Now when I relaunch the computer (iMac late 2013 27" model) and choose to run the Windows 7 Home Premium disk I can get to the menu where I may enter language, keyboard type and such but I physically can't. My keyboard and mouse both fail to do anything and my Wireless USB mouse and wired keyboard aren't achieving anything else. Any suggestions would be much appreciated.
iMac, OS X El Capitan (10.11.2)