pag push mo ng power button, press f2 to access bios settings..pag nasa bios settings ka nah, hanapin mo yung tab ng boot menu..gamitin mo arrows sa pag navigate through different tabs..
kung may bootable usb os ka, boot first mo lang yun then wait mong lumabas yung interface ng setup kung naka partition ka delete mo lahat para maging 1 (partition) nalang then before format mo muna yun then proceed kana sa os installing