How to reset bios?/which should I jump

While the "TOSHIBA" logo is displayed, press the F2 function key to start BIOS Setup. Check the version of BIOS and press the F9 function key then Enter to load setup defaults. Press the F10 function key then Enter to save settings and exit. The computer will automatically reboot.

Most often, resetting the BIOS will reset the BIOS to the last saved configuration, or resets your BIOS to the BIOS version that shipped with the PC. Sometimes the latter can cause issues if settings were changed to take account for changes in hardware or OS after install. Make sure you backup the previous BIOS version.