Technical Support Bulletin

Necessary changes in the UEFI Firmware (BIOS) for a successful downgrade from Windows 8 to Windows 7

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 Model No.:
 Operating System:
Windows 7 - 32 Bit, Windows 7 - 64 Bit, Windows 8 - 32 Bit, Windows 8 - 64 Bit, Windows 8 - Upgrade
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If Windwos 8 is preinstalled on your notebook and you want to downgrade the OS to Windows7, some changes must be done in the UEFI FW before you're be able to install Windows 7.


Steps to follow for the downgrade to Windows 7:

  • Create recovery media for your Windwos 8 system before you proceed to any other step, otherwise you will be not able to install Windwos 8 OS again on your device! 
  • Proceed to the changes in the UEFI FW ( BIOS) before the installation
  • Install the Windows 7 OS on the notebook


If you want to install Windows 7 instead of Windows 8 you have to perform some changes in the UEFI firmware first.

  1. Enter the UEFI firmware (formerly known as BIOS) by long-press the F2 button and turn on the notebook.
    Go to the "Security" tab and change the value of the "Secure Boot" option to "Disabled"

  2. Go to  "Advanced" tab -> "System Configuration" -> and change the "Boot Mode" option from "UEFI Boot" to "CSM Boot"

  3. Save and close the UEFI settings by pressing the F10 key. 

If this steps are done, Windows 7 can be installed on the Notebook without any problems.


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