After installing a Linux distro(mint 19.3)(yes I know I am in the Ubuntu forum, I'll get to that later) it locked my bios settings - it couldn't boot because it was missing files( I can't change anything, neither restore to default settings, also relocked my secure boot) - picture :
https://ibb.co/xfkqZrQ
https://ibb.co/NtfpCwq
(Majority of options are grey, cannot access them)
I managed to install a version of Windows and get it boot(after removing the HDD and plugging it while the windows setup was loading, from there I managed to access an Ubuntu live installation usb key using advanced system restart option in windows(the mint one won't boot and neither Manjaro this way, only Ubuntu - secure boot related). Then I installed Ubuntu alongside Windows, now only windows boots. For unlocking the bios settings I also tried( while booting from a live usb without HDD attached) :
Resetting the CMOS manually - the motherboard has no jumpers, unplugging the battery doesn't work(left it off for 8 hours, it only reset the clock but not other settings
Deleting the EFI partition - using gparted from Ubuntu - didn't work and I had to reinstall windows again
Trying sudo modprobe nvram from Ubuntu terminal, commands return no error but it didn't do anything.
The "EFI file boot 0 :yes" In the second picture is the mint installation that locked my bios settings and then didn't boot, I managed to change boot order from Ubuntu using efibootmgr
I also deleted the "yes" boot entry but it keeps coming back....
Now the laptop only boots windows...is there any way I can unlock the BIOS settings?
Laptop is an Acer es1-531-p7n0
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