[Mashiro]

First of all i will thank you for replying me. and now i will ask you, how can i reset the UEFI BIOS? Do i try to reset system setup settings to default? or any different mechanism to reset UEFI BIOS?

Such an option in your BIOS/EFI/UEFI would be usually called "Load default values" or similar. Another option is to perform a CMOS reset (either through a switch on the mainboard, a jumper or by removing the CMOS battery).

Please keep in mind that the OS information might also be just written on the disk itself if a BIOS reset doesn't remove it (MBR/GPT partition table entries). In that case you might really have to wipe the whole disk and also install a new OS in UEFI mode. The BIOS handles legacy mode installations different than UEFI. These are two seperate things.


Beware: A CMOS reset or the loading of default values will wipe all custom settings in your BIOS/UEFI! This might lead to more issues if you had things setup in a certain work. Be careful with what you do. You're doing everything at your own RISK!