Below are the limitations from Windows 8 to Windows 7 downgrade.

    Article ID : S500026415 / Last Modified : 11/04/2018Print

    Windows 8 to Windows 7 Downgrade Limitations

    Note: Some of the limitations listed below may or may not be applicable to your computer.

    1. Unable to change the LCD brightness by using function keys.
    2. Unable to control the wireless device using VAIO Smart Network.
    3. The Boot Mode returns to UEFI from Legacy as Default value.
    4. When installing operating system, it is necessary to change the settings to Legacy mode.