Installed Linux - Don't have access to BIOS any more. [G580]

[Screen]

So, This happened quite some time ago. When i installed Linux Mint onto a laptop which had BIOS, (Yes, quite old system.) And since then. I don't have access to the system BIOS. All i can do is select boot device and it boots into the os. The bios part essentially won't show up. For my understanding it is due to the installation going the UEFI way and messing something up, I tried to get it working by taking the hard drive out to see if there is something and it does not work that way. So Any way to get this thing fixed up? It's a lenovo g580 with an intel pentium dual core processor. What went wrong. and What can be done to get it back how it was. .

 

 

These are the screens i have access to now.

*I did successfully re-flash the bios via a bios file via usb. But still getting the same thing. Now the Linux installation have also gone haywire by booting into Initramfs adding more salt to the injury. and i want to get rid of this whole linux sh*t and install back windows again with normal accessible BIOS.

[DakotaWebber]

systemctl reboot --firmware-setup

[Screen]

36 minutes ago, DakotaWebber said:

systemctl reboot --firmware-setup

Cannot indicate to EFI to boot into setup mode : Operation not supported.

 

[Guest]

On 8/3/2019 at 7:12 AM, Screen said:

Cannot indicate to EFI to boot into setup mode : Operation not supported.

 

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