I read that the last version of SPUTNIK had some issues when bootet in BIOS Legacy mode on harddrive with GUID Partition Table. The message "Operation System Not Found" was dropped. Also the Partition Table of the OEM install is MBR. I will install Arch Linux and reformat the whole drive before and I would like to use GPT in BIOS Legacy Mode. Does someone know if with Sputnik 3 with this configuration run into the same issue or not? Or does anyone use BIOS Legacy Mode with GPT?