Warning: If your Gateway™ computer is updated with the incorrect BIOS, it may render your system unusable. If you're unsure as to which BIOS you need, reboot your system. The BIOS information will be displayed almost immediately. The suffix (or in some cases, the prefix) of the BIOS will indicate which update is correct for your system (ie. CN0T, CY1T, etc.). If you are still unsure as to which one it is, please contact tech support.