BIOS Update for Windows 8 (32-bit, 64-bit) – IdeaPad U310, U410

NameOperating SystemVersionReleasedDownload
BIOS Update
Windows 8 32bit,
Windows 8 64bit
9909 Sep 2013Download
Windows 8 32bit,
Windows 8 64bit
9909 Sep 2013Download

Supported Systems

  • IdeaPad U310, U410

Supported Operating Systems

  • Windows 8 32-bit, 64-bit

Important Information

  • BIOS, abbreviation of Basic Input/Output System, is integrated in ROM chip on main board, which contains the basic input/output program, system configuration information, system startup self-check and pre-setup programs. BIOS provides most basic low-level hardware operations; it is the connection between software and hardware, and interfacing window of hardware and operating system.

    Note: Make note of any settings you have changed in the BIOS Configuration Utility. These settings may have to be re-entered after updating the BIOS.

    Attention: Do not power off or restart your computer during the BIOS flashing process, which will cause serious damage and improper functioning of your computer.

Updated Information

  • Fix issue: BIOS and boot menu can't be accessd after windows recovery.

Downloading the package

  1. Click the file link to download the file from the web page.
  2. Please download the right update package according version.
  3. When prompted, select a drive and directory in which to save the downloaded file.

Install the package in Windows

    1.  Restart computer. Press Fn+F2 enter BIOS.
    2. Choose "Configurtion-> BIOS back flash" , set to Enabled.
    3. Choose "Boot-> Boot Mode", set to UEFI. save and exit.
    4. Locate the file 65cn99ww that has been downloaded.
    5. Double click the 65cn99ww For Windows 8, you may run it as administrator by right-clicking on the icon and selecting “Run as administrator”.
    6. Click YES.
    7. System will reboot and flash BIOS. During the process, you are advised not to turn off the computer.
    8. When the update finishes, the computer will automatically reboot for the changes to take effect.
    9. Press Fn+F2 to enter BIOS menu, load default setting-> save and exit.
    10. Please reboot the system again.

    6 thoughts on “BIOS Update for Windows 8 (32-bit, 64-bit) – IdeaPad U310, U410

    1. se me daño el disco duro de mi idea pad u410 y no puedo accesar al bios, el otro disco esta inservible y el boton de acceso al menu lenovo me muestra las opciones pero no las ejecuta cuando le doi Bios Setup o BOOT menu. alguna solucion?

    2. My hdd broken, and already cant access to any option, bios setup or boot menu, the laptop show the options but dont work, i have an idea pad u410

    3. Hi, I updated my u410 BIOS following Lenovo advises (, but there are not described the step 2 < BIOS back flash” , set to Enabled >>. Can this be cause of my laptop not start in UEFI anymore? Note: Now my BIOS describe my hardware as u310.
      Also I tray in Legacy Mode, Windows work well, but after install Intel Rapid Storage Technology Driver 0wrs06w8, windows fail and only show me recovery options

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