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    Toshiba C55t-A5123 Has no access to UEFI/CSM

    Discussion in 'Toshiba' started by pclaptop23hour, Sep 14, 2016.

  1. pclaptop23hour

    pclaptop23hour Notebook Enthusiast

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    I have a Toshiba C55t-A5123 that had a Windows 10 upgrade installed on to a wiped hard
    drive. (No going to Settings to revert back to previous OS.)

    The CD/DVD drive,(I had changed boot order to look at the Optical drive first), with a Win7
    install disk was not recognized at boot up to facilitate a complete new Win7 install over
    top of the current Win10 OS.

    I re-wiped the hard drive and formatted it to NTFS, and then used the disk manager from
    another laptop to change it to GPT!

    When I tried to use my Windows 7 Ultimate DVD to re-install (changed boot order so OD CD
    \DVD was first) but this C55t wont boot from the DVD! Now this is the same DVD that came
    with this unit but yet it wont boot the Win7 install DVD!!

    I read where THIS Toshiba model (because Toshiba was in cahoots with Microsoft) has no
    provision in BIOS to switch to from UEFI to CSM, UNLESS the bios was updated to v 1.03 (I
    think that is the latest version)! I did disable "Secure boot" which was the only
    associated option!

    I then created a GPT UEFI USB memstick with Win7 Ult ISO, which booted fine and installed
    Win7 Ultimate to the re-GPT'ed 500gb SATA hard drive.

    But on reboot after Win7 Ult install the ONLY bootable media device found was the USB Win7
    memstick???

    This C55t-A5123 will only boot to the memstick and completely bypasses (changed boot order
    to make HDD first) the GPT HDD that has just had Win7 Ultimate successfully installed!

    If I let it boot to the USB MEM stick it starts the Win& installation all over again!

    If I remove the USB MEM stick, I get "Checking Media" and then "No bootable Device --
    please restart system" !

    It completely ignores the Win7 install on the 500gb GPT SATA hard drive!

    Apparently I still need to update BIOS so I can change UEFI to CSM. But how do I do that
    when there is no bootable device that contains the "scjev130.exe" executable file?

    Is there a way to load/install this BIOS upgrade from a USB memstick?

    I find it really reprehensible that such an option was deleted from BIOS choices, just to
    make it difficult for a Toshiba user top revert back to windows 7! That is what I have
    read anyway!

    Thanks in advance for ANY input on how to get Windows 7 back on this Toshiba, how to recognize the install and/or
    how to upgrade the bios from memstick.
     
    pclaptop23hour, Sep 14, 2016
    #1