Acer AX1400 Service Manual page 72

c. Press Enter to flash the system BIOS.
4. Perform the steps below if your computer is running 64-bit Windows.
a. Key in 'cd wintool\64'. (Go to BIOS path like "D:\WinTool\64")
b. Key in 'flash1M.bat' or 'flash1M'.
64 Aspire AX1400 Service Guide