I am hitting F8 when rebooting and my ThinkCentre M55 8811 does not respond to it. What am I doing wrong?
If you use a USB-Keyboard, it's a little bit tricky to press the Function key during the small "time-window". You can just press F8 a lot of times in a very fast sequence and ignore the beeps at every keystroke.
Do not hold down the F8-key permanently, because it will cause a keyboard-error and leads you into the BIOS.