New
#1270
As far as I know, it should always have the option listed when performing a clean install "I don't have a key". It's been that way for me every clean install I have done in that last 2 years (around 25 clean installs).
The reason you have to press Fn is because your device, which I assume is a laptop, has the F-keys mapped to device functions as default in the BIOS< and you need to hold Fn whenever you want to actually use the F-keys *as* F-keys. This can be changed if you want, with the steps to do so depending upon your manufacturer.
As for the error - did you verify that after reboot and starting setup that your newly created partition was still, in fact, H?