Windows 8 and 8.1 Forums


After Toshiba BIOS upgrade 5.10 Win 8.1 refuses to start

  1. #1


    Posts : 7
    Windows 8.1

    After Toshiba BIOS upgrade 5.10 Win 8.1 refuses to start


    After a Toshiba update utility installation of the latest BIOS (5.10) on my Win8.1 Laptop, the PC won't reboot the OS.
    I can reboot to the WinRE partition (0) on the disk but System Repair does'nt work.
    I did a complete system RESET from the Factory Recover partition and the OS still refuses to boot.
    I can get to Command Prompt.
    -PC is 1-yr old, model Satellite C50t. Win 8.1 home, EUFI install
    -All 5 partitions seem ok.
    -I see a Key in BIOS table MSDM
    -Tried bcdboot, bootrec /fixboot on C: and bootsec /nt60 C:

    Any suggestions welcome,
    Thanks.
    Last edited by rodec; 20 Sep 2015 at 14:43.

      My System SpecsSystem Spec

  2. #2


    This is a UEFI system, correct? Is BIOS setup for UEFI and GPT, not Legacy or MBR?
      My System SpecsSystem Spec

  3. #3


    Posts : 7
    Windows 8.1


    Yes BIOS is set to UEFI boot mode and Secure Boot enabled. Disk drive is 1TB, has GPT with 5 partitions. Partition 1 is System EFI.
    I'm not sure but from what I can see, the bootmgr runs and then the winloader, I see rotating dots for about 10 or 15 sec. then they freeze. I reboot (long press on power) and system goes to Automatic Repair by itself. I can get to the Command Prompt and look at the Srttrail. Tests where run successfully but the last entry I see shows: 1 cause found "Failure while Setup in progress".
    Last edited by rodec; 20 Sep 2015 at 22:10.
      My System SpecsSystem Spec


  4. #4


    What about downgrading to the previous BIOS:

    14 Apr 2014
    Bios Updating Bios (V1.30) for Satellite C50-A (P0014_P0015_E0011_P0110) Bios Update 9.96 MB
      My System SpecsSystem Spec

  5. #5


    Central IL
    Posts : 3,468
    Linux Mint 17.2


    Try pulling the Battery, power and the Cmos Battery on the Motherboard. You have to remove the Hard Drive to get to it. Otherwise you can remove the back, which is not that hard.

    It is also possible that something happened during the Bios Upgrade. Will the unit boot up in a Win PE disk or Linux Live DVD?
      My System SpecsSystem Spec

  6. #6


    Posts : 7
    Windows 8.1


    Yes the unit can boot from the DVD or from a USB drive or from the WinRE partition on disk (partition 0). I could load and run the WIN81RESE_x64.ISO on a USB.

    Before downgrading the BIOS I tried to re-install the OS to see if the unit would boot Windows normally with Secure boot enabled. I installed W8.1 from the ISO DVD and it started OK so I guess the BIOS is not the problem and some corruption probably occur during the BIOS update.

    But I'm now having problems installing the missing drivers. Device Mgr found 4 missing drivers in "Other devices": 2 where for Intel, 1 for a PCI card reader and one for a PCI Network Controller. I managed to install 3 of the 4. I can't install the Network Controller. It's deviceID property indicates an Atheros WLAN.
    I installed the latest version of that driver from the Toshiba support site but it crashes Windows at the end of the install proc, when it tries to initialize the device.

    Now I'm back to freezing dots and system Reset. It seems that the re-install also replaced the WinRE partition with a new one where the path to the factory recovery image in partition 4 is now missing. It might be possible to reset to factory now that windows can boot but I don't know how to tell WinRE to use partition 4 instead of the install DVD.
      My System SpecsSystem Spec

  7. #7
      My System SpecsSystem Spec

  8. #8


    Sydney, Nova Scotia, Canada
    Posts : 6,479
    Windows 10 Education 64 Bit


    I had a very similar issue on my ASUS laptop. Did a BIOS upgrade and on the next boot up all I got was the ASUS logo. I never saw the circle of dots, it just keep rebooting to the LOGO over and over again. After lots of trial and error, BIOS resets, etc. I discovered it only failed to boot if my second Data hard drive was connected. There was something about the partition structure or something Windows didn't like. I ended up connecting that drive to my desktop PC and running a Diskpart clean command. Then I put it back in my laptop and Windows booted up fine. Then I just partitioned it, formatted it, and copied all the files back to it from my portable backup drive. This laptop has UEFI. I've flashed the BIOS on it before and never had an issue. For a while there I thought I had bricked it. I was trying anything and pulled the hard drives and optical drive to discover it booted to the BIOS. Then I started plugging things back in one at a time. I still have no idea what happened, I'm just relieved I got it working again.
      My System SpecsSystem Spec

  9. #9


    Posts : 7
    Windows 8.1


    Thanks for all the input and suggestions. Here's the current situtation:
    -the Network Controller Device without a driver is a Qualcomm Atheros AR9485 Wireless Network Adapter.
    -Device Manager does not show an Ethernet adapter, Very strange since there is one in the unit. But I remember trying to use the wired port unsuccessfully before doing the BIOS upgrade. The laptop has always been connected via Wi-Fi. The LAN card is supposed to be a Realtek but does'nt show even after the driver is installed.
    -The latest Atheros driver supplied by Toshiba could not be installed without freezing the system.
    -Pressing F12 will Activate Airplane Mode (cut Wi-Fi from the Atheros), the LED goes Of.
    -Using a USB Wi-Fi dongle, Windows found a driver online and did the install without crashing. Device manager then shows it as a Network Adapter and not a Controller. Status is Device working properly.
    -After the USB adapter is removed and the Atheros is reactivated (F12 Airplane mode Off), the system freezes and a reboot is needed.
    -During reboot, hitting F12 again turns the Atheros Off before the OS is loaded and the system will start normally.
    -The re-installed OS is up-to-date, Windows Update applied 134 updates when the USB adapter was connected. It also shows the W10 update available.

    With the RecoveryMediaCreator utility supplied by Toshiba, I copied the original factory recovery partition to a USB drive but did not attempt to restore it. It may or may not be possible to boot it even when the Atheros is inactive (F12). I should try it after doing a system image of the current working system.

    The previous version of the BIOS is not avaliable for this model on the toshiba site. Model C50t-B-00V.
      My System SpecsSystem Spec

  10. #10


    Eastbourne uk
    Posts : 86
    Windows 10 Home x64: 1607 Redstone (1) Build 143934.447


    Quote Originally Posted by rodec View Post
    Thanks for all the input and suggestions. Here's the current situtation:
    -the Network Controller Device without a driver is a Qualcomm Atheros AR9485 Wireless Network Adapter.
    -Device Manager does not show an Ethernet adapter, Very strange since there is one in the unit. But I remember trying to use the wired port unsuccessfully before doing the BIOS upgrade. The laptop has always been connected via Wi-Fi. The LAN card is supposed to be a Realtek but does'nt show even after the driver is installed.
    -The latest Atheros driver supplied by Toshiba could not be installed without freezing the system.
    -Pressing F12 will Activate Airplane Mode (cut Wi-Fi from the Atheros), the LED goes Of.
    -Using a USB Wi-Fi dongle, Windows found a driver online and did the install without crashing. Device manager then shows it as a Network Adapter and not a Controller. Status is Device working properly.
    -After the USB adapter is removed and the Atheros is reactivated (F12 Airplane mode Off), the system freezes and a reboot is needed.
    -During reboot, hitting F12 again turns the Atheros Off before the OS is loaded and the system will start normally.
    -The re-installed OS is up-to-date, Windows Update applied 134 updates when the USB adapter was connected. It also shows the W10 update available.

    With the RecoveryMediaCreator utility supplied by Toshiba, I copied the original factory recovery partition to a USB drive but did not attempt to restore it. It may or may not be possible to boot it even when the Atheros is inactive (F12). I should try it after doing a system image of the current working system.

    The previous version of the BIOS is not avaliable for this model on the toshiba site. Model C50t-B-00V.
    See if a version of the BIOS model no C50-B-14Z will do as that is what mine is and it updated OK
      My System SpecsSystem Spec

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After Toshiba BIOS upgrade 5.10 Win 8.1 refuses to start

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