If you want to have a clear understanding and a nice explanation of BIOS boot-ing, UEFI boot-ing, etc…, Highly recommend this article –
UEFI boot: how does that actually work, then?
I have managed to mess up my work station, only because I have connected an SSD to the desktop and installed Ubuntu on that guest SSD,
So after installing Ubuntu on the guest SSD, and removing it from my workstation… DESPAIR! – my Linux Mint did not boot!!? – I panicked and I just wanted things to work the way they were
So I looked for a quick solution, Boot Repair which with just a few to solve my problem… of course it didn’t work and it might’ve broken things even worse…
Into Java 