I recently changed the bios settings to allow to boot UEFI so that I can install Linux. After installation I can no longer boot to bios using F2 I even tried F10 to bring up boot menu but nothing happens. I formatted the HDD and installed Windows and tried to downgrade the bios but it doesn't allow bios downgrade. I currently have BIOS Version 09QB. I even took the CMOS battery to rest bios but can't enter bios even with an external keyboard. Due to resetting the bios to factory defaults I can no longer boot UEFI based OS.I can't access it by windows 10 advanced restart and selecting UEFI Firmware settings as the bios is a legacy one and even though I had stated that I changed it, it only allows booting of UEFI based OS's and install it on a GPT partition and bios is a Legacy one. Now I can't even install Linux as the computer doesn't recognize it. The BIOS doesn't have fast boot or secure boot option.
Laptop Specs
Samsung NP300E5Z-A0ESA
BIOS Ver: 09QB
Processor: Intel Core i3-2350m
HDD: Seagate 320GB
RAM: 2x2GB DDR3