Windows 8 and 8.1 Forums


hi and help with graphic card windows 8.1

  1. #1


    Posts : 3
    windows 8.1

    hi and help with graphic card windows 8.1


    hi all i have windows 8.1 and a geforce gt640 graphic card when i connect my monitor to the card it wont boot but when i put monitor cable onto onboard graphics it boots how can i make it so i can use my gt640 card instead of onboard pls

      My System SpecsSystem Spec

  2. #2


    Posts : 3
    windows 8.1


    just letting you know i sorted this and the simple answer is to go into bios and disable secure boot
      My System SpecsSystem Spec

  3. #3


    That makes no sense to me. Did you find an article somewhere that suggested doing this? If so, could you post a link to it?

    Do several Windows Updates (3 or more) until all updates have been installed. Also check Optional updates, see if there are any for the Geforce GT640 and install them.

    Once that has completed, enable Secure Boot and see what happens.
      My System SpecsSystem Spec

  4. #4


    Posts : 176
    Windows 8.1
      My System SpecsSystem Spec

  5. #5


    Well I'll be dipped! Many thanks for that link WinUser.


    How Secure Boot works

    Secure Boot Configuration is a new feature in BIOS 8 that allows your computer to validate the authenticity of components like hardware and firmware. When your computer was manufactured, UEFI created a list of keys that identify trusted hardware, firmware, and OS loader code. It also created a list of keys to identify known malware. When Secure Boot is enabled, the computer checks that everything being loaded and used even before Windows opens is safe and recognized. Secure Boot also checks the validity of critical hardware, including the motherboard and video card. Any malware or other firmware code that is not recognized is blocked. For example, Secure Boot can prevent your computer from starting from illegally copied CDs or DVDs that could harm the computer. Secure Boot does not lock out valid recovery discs or Windows discs.

    If an older model video card is installed in the computer, Secure Boot might not recognize it as valid hardware. If the card is not recognized, Windows does not use the card when it boots up, and you may experience problems starting the computer, or there might be no video output at all.

    To resolve the issue, you can use a video card that Secure Boot recognizes, or you can disable Secure Boot and enable Legacy Boot in the BIOS. This document explains how to disable Secure Boot and enable Legacy Boot.
    Bumbleskulls, my apologies, your fix is right on the money.
      My System SpecsSystem Spec

  6. #6


    Posts : 3
    windows 8.1


    I didnt find it online i emailed the company which makes my pc they emailed me bk with the sugestion and bingo it worked
      My System SpecsSystem Spec

hi and help with graphic card windows 8.1
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