Can't get a blue screen

I have followed your instructions, but the system never shows a blue screen, just continues in a reboot loop. It bails every time just before I get to the "Welcome" screen.

Is there an easy way to find out the dates that apps were installed in? I would be happy to remove the last app(s) if I knew which one it was!

Finally, the computer will not boot in Safe mode, with or without networking.