Acer Aspire TC-780 Service Manual page 108

6. Select Yes to Restart.
7. Press the F12 hot key to enter Boot Menu, then select USB thumbdrive.
8. Press Enter to boot system using USB thumbdrive.
9. Enter BIOS folder.
10. Enter "DOS" folder.
11. Execute "BIOS_DOS.bat" file.
12. Process to flash BIOS (don't reset).
13. Press the power button to shut down the system.
14. Press the power button to turn on the system.
The system will now execute the BIOS update process.
15. Press Delete when the company logo is displayed on the screen to enter BIOS Setup Menu.
100 Aspire TC-780 Desktop Computer Service Guide