When you do the OS Switch, it reverts to windows mode, resets the bios, then tries to boot windows cant find windows so it reverts again I recall.
Been a while since I have done this,
When it tries to find windows press F7 and boot from USB stick with windows on it and should reinstall or give you option to fix.
There was a post about how to do this but has been removed due to the clean up recenlty I beieve.
Comment