Ok so I installed Chrome OS on my HP laptop that comes with Windows with a brunch installation and now I can't access to the boot menu or even the BIOS.
If someone else encounters this kind of problem just remove the bios battery and the hard drive and put that hdd in a pc, reformat it and put everything back where it was.
Ok so I installed Chrome OS on my HP laptop that comes with Windows with a brunch installation and now I can't access to the boot menu or even the BIOS.