Windows 10: UEFI boot issues

  1.    27 Jul 2017 #1

    UEFI boot issues

    Hi Everyone

    i recently wiped my PC and reinstalled the most recent ISO from Microsoft, i changed from MBR to UEFI and i'm experiencing a few issues

    1. turn pc on without monitor / pc on it turns on and posts but the screens are blank when i power my monitor on
    2. if my pc has been booted up and the monitor powers off for power saving or i turn it off the PC crashes completely
    3. every other time i boot my PC it starts a disk check

    Intel i7 4790K
    ASUS Z97 Pro Gamer A - (latest BIOS 2203)
    Kingston Hyper X 1866Hz
    XFX R9 290x Black Edition 4gb
    Samsung EVO 850 evo 250gb
    WD Mechanical Drive (storage only)

    i have removed and reinstalled all drivers
    i have disabled PCIE power management under power

    note: before my reinstall, i never had these problems

    any suggestions you have would be greatlly appreciated
      My ComputerSystem Spec

  2.    27 Jul 2017 #2

    Hi, just wondering what the build was that you last ran successfully on your PC.

    Were you running e.g. the Anniversary build or the Creator's build? (The latter is the one that was released a couple of months or so ago).

    Having downloaded the latest iso, that would be the Creator's.

    It would also be worth doing a disk check. However you have a SSD, so HD Tune on Kyhi's boot disk (top of the Software and Apps section) isn't useful, unfortunately, but you could use HDDScan on it.

    See also
    Clean Install Windows 10 Windows 10 Installation Upgrade Tutorials
      My ComputerSystem Spec

  3. Caledon Ken's Avatar
    Posts : 9,794
    Windows 10 Pro x64 Build 1803
       27 Jul 2017 #3

    Hi xKoldx. Welcome to the TenForums @xKOLDx

    Not to challenge you. When you said you changed MBR to UEFI did you mean you changed MBR to GPT ?

    Next, what changes did you make in BIOS to support this change to UEFI boot?

    I can't find that board at Asus. In your board manual look for the word CSM and have a read. When doing the clean install have secure boot and fast boot disabled in BIOS.

    Assuming your HDD is blank and ready for Windows I would do this.

    Boot the computer from Windows 10 installation USB flash drive or DVD. When the first screen comes up press shift + F10. In the command window that opens run the following commands. This process will kill all data on drive, ALL !!

    List disk
    select disk 0 (make sure disk 0 is where you want to install Windows, check twice)
    Convert gpt (if required for UEFI)

    Proceed with install and let Windows create partitions it needs.

      My ComputerSystem Spec

  4.    27 Jul 2017 #4


    Thank you for your quick reply and for welcoming to the forum, you are correct i did mean GPT i have been thinking UEFI while trouble shooting not too sure why

    Under boot i changed the boot from legacy to uefi i have also tried a mixture of the settings

    The motherboard i own is:
    Z97-PRO GAMER | Motherboards | ASUS United Kingdom

    I have tried booting with CSM enabled and disabled

    I don't believe i disabled these when i did my fresh install, what effect would these of had to my installation?

    My HDD is for storage my SSD is my primary drive but i can wipe it this evening and retest

    i ran those commands when i reinstalled my copy of windows
      My ComputerSystem Spec

  5.    27 Jul 2017 #5


    sorry i hadn't seen your response

    yes creators build, i will run a disk check using the tool suggested when I am home

    many thanks
      My ComputerSystem Spec

  6. Caledon Ken's Avatar
    Posts : 9,794
    Windows 10 Pro x64 Build 1803
       29 Jul 2017 #6

    The exact effect of not setting to secure boot and fast boot to disable I can't fully comment on. If Secure boot isn't disable you should not have been able to boot for external media.

    Fast Boot is where I get fuzzy. These all store things, (Fast Boot, Fast Startup) and this could definitely, in my opinion, be interfering with your clean install.

    When Brink says disable, it is better to follow than experiment.

      My ComputerSystem Spec

  7.    31 Jul 2017 #7

    Hi Everyone

    Got this issue sorted, had to reset the "power plans" within control panel then rebooted and selected high performance booting with no issues :)

    Many Thanks
      My ComputerSystem Spec

  8.    31 Jul 2017 #8

    Caledon Ken said: View Post
    The exact effect of not setting to secure boot and fast boot to disable I can't fully comment on. If Secure boot isn't disable you should not have been able to boot for external media.
    Where is this coming from?

    I've installed Windows 10 plenty of times with Secure Boot enabled using external drives without issue. The last being my 2013 Asus Zenbook notebook when I installed the CU version of Windows 10 from a thumb drive. And as far as I know both Windows 8 & 10 do not need secure boot disabled to install the OS.

      My ComputerSystem Spec

  9. Caledon Ken's Avatar
    Posts : 9,794
    Windows 10 Pro x64 Build 1803
       31 Jul 2017 #9

    Thanks sygnus21. I learned something. My statement was incorrect.
      My ComputerSystem Spec


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