Windows 10: Installed Windows 10 in GPT drive, but changing BIOS settings from CSM to UEFI doesn't let...

Discus and support Installed Windows 10 in GPT drive, but changing BIOS settings from CSM to UEFI doesn't let... in Windows 10 Ask Insider to solve the problem; My motherboard - MSI B450i Ryzen 7 2700 2 * 8GB DDR4 Ballistix RAM Samsung Evo 860 480 GB I've recently installed and setup my desktop. When... Discussion in 'Windows 10 Ask Insider' started by /u/kvn95, Sep 18, 2020.

  1. /u/kvn95 Win User

    Installed Windows 10 in GPT drive, but changing BIOS settings from CSM to UEFI doesn't let...


    My motherboard -

    MSI B450i

    Ryzen 7 2700

    2 * 8GB DDR4 Ballistix RAM

    Samsung Evo 860 480 GB



    I've recently installed and setup my desktop. When installing I had kept the BIOS settings in default, which set things to CSM.

    Since I had installed the Win10 in GPT partition and my msinfo32 was also showing BIOS mode as UEFI, I thought I would change the BIOS to UEFI.



    When booting into Windows with this change, it keeps on loading (dots going in circle at bottom) and keeps rolling for as long as it's let to. Restarting triggers automatic repair, but after Diagnosing my PC, I just see the light blue screen, again for as long as it's let to (I tried 30 min on each, didn't see any change/progress).

    What could be the issue? Is a reinstall the only way?? Would rebuilding my BCD help?

    submitted by /u/kvn95
    [link] [comments]

    :)
     
    /u/kvn95, Sep 18, 2020
    #1

  2. Trouble installing windows 7 on RAID in UEFI

    As the title says, I'm trying to install Windows on a RAID array in uefi on my Maximus V Formula. When using legacy ROM I can install just fine but I go into CSM and change settings to UEFI only, I can build the array in the UEFI Raid driver (IRST tab in "BIOS") but the array does not show up in the boot menu and when I try to install windows (boot from UEFI DVD drive), The drive does not show up in the Windows install. The next thing I tried was to enable UEFI and legacy oprom in CSM, boot from UEFI DVD drive and install to the RAID array (probably detected by legacy oprom) and it will install. After first reboot, Windows Boot manager will show up as an option in the BIOS boot menu so I set that as first boot device and reboot. I will get to the starting windows screen and then BSOD (too quick to get codes) The last thing I tried was Changing to legacy mode and installing windows to a different drive. once installed, I initialized the Raid array as GPT and rebooted, changed csm back to UEFI only but they RAID array still doesn't show in the boot device list so I repeated the earlier process hoping that It might work because I had initialized as GPT but it still BSODs on starting windows screen. Any help or suggestions would be greatly appreciated
     
    mystiksinner, Sep 18, 2020
    #2
  3. FX-GMC Win User
    Trouble installing windows 7 on RAID in UEFI

    I think you were on track with your first try. Windows installer probably needs the RAID driver in order to detect it on install.

    Installed Windows 10 in GPT drive, but changing BIOS settings from CSM to UEFI doesn't let... [​IMG]
     
    FX-GMC, Sep 18, 2020
    #3
  4. gupsterg Win User

    Installed Windows 10 in GPT drive, but changing BIOS settings from CSM to UEFI doesn't let...

    UEFI vs Legacy boot mode

    Switching to UEFI bios on GPU does not enable UEFI mode if motherboard is set CSM = On. Setting CSM = Off in my experience causes Windows 7 issues, even if installed as UEFI mode with GPT partition on storage device.
     
    gupsterg, Sep 18, 2020
    #4
Thema:

Installed Windows 10 in GPT drive, but changing BIOS settings from CSM to UEFI doesn't let...

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