Win7+Daz but can't disable UEFI/GPT (bios bug?)

Discussion in 'Windows 7' started by L_C, Apr 23, 2013.

  1. L_C

    L_C MDL Novice

    Apr 23, 2013
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    Hi, I have an Acer P2xx series notebook with win8, but I like to try win7+Daz Loader so I need a MBR partition, so I must disable the UEFI bios settings.

    The only bios UEFI settings are:
    Boot Mode:
    UEFI
    |-Secure Boot ( enabled or disabled )
    Legacy Bios

    I moved to "Legacy bios" but when I try to install windows 7 from CD the setup makes a GPT partition.
    I tryed to make a MBR partition with a boot utility CD, then tryied to install windows 7 on it, but the setup tell me that my System can't boot on a MBR so I need to delete the MBR and create a GPT.

    Is the bios buggy that won't disable UEFI for real and makes the win7 setup force with GPT creation ? ( I have the latest bios version )

    How can I workaround that ?
    - is it possibile to force windows 7 setup to install on the MBR ?
    - is there a daz similar that works with GPT partition ?
    - what else ?

    Thanks:)
     
  2. Carlos Detweiller

    Carlos Detweiller MDL Spinning Tortoise

    Dec 21, 2012
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    Did you set Boot Mode to Legacy? If the installation boots from EFI bootloader it requires GPT. You must have it boot from the legacy BOOTMGR.
     
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  3. pisthai

    pisthai Imperfect Human

    Jul 29, 2009
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    Also, if possible, set the SATA Mode to IDE, not AHCI!

    Boot options must be set to legacy. Secure Boot to disabled.

    If you have an PC, remove the HDD from Laptop, connect it to the PC and run normal Windows on PC. Now you could create the 2 needed partitions from within Windows and format them.
     
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  4. Carlos Detweiller

    Carlos Detweiller MDL Spinning Tortoise

    Dec 21, 2012
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    Windows 7 should handle AHCI fine. Now, XP would be a different story...
     
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  5. pisthai

    pisthai Imperfect Human

    Jul 29, 2009
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    Normally no problems with AHCI in Windows 7! But i'd some problems with it just for Installation. After the Installation of W7 is done the change back to AHCI isn't any problem any more.
     
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  6. L_C

    L_C MDL Novice

    Apr 23, 2013
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    yes, I'm in legacy mode with secure boot disabled, but my windows 7 setup forces the installation to create/install only GPT partition.

    I can't set IDE/AHCI ( bios force to use AHCI ), but I think that's not the problem.
     
  7. L_C

    L_C MDL Novice

    Apr 23, 2013
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    I had the same result partitioning/formatting in MBR/NTFS with a boot CD ( with RIP Linux ), but when the windows 7 setup find the MBR partition it won't install on it, it say the PC can't boot in that partition..... but.. bios is in lecacy mode!!o_O
     
  8. Michel

    Michel MDL Expert

    Jul 29, 2009
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    My laptop is set on AHCI and in the past i tried to swap it back to IDE (for the loader) and the results are BSOD all the time untill i switch back to AHCI (I think it has something to do with my SSD because with my old hdd the loader worked fine). The only thing that worked in my case was a bios mod and get activated :biggrin:
     
  9. Droogie128

    Droogie128 MDL Novice

    Apr 23, 2013
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    Sorry to hijack, but what if there is no option to boot without UEFI? Meaning, that option doesn't exist in the UEFI bios.
     
  10. Carlos Detweiller

    Carlos Detweiller MDL Spinning Tortoise

    Dec 21, 2012
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    If the machine is able to show some sort of a boot device selection menu (after press of a hotkey), the drive in question should be listed two times. Use the entry that doesn't have the (U)EFI badge assigned.
     
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  11. Droogie128

    Droogie128 MDL Novice

    Apr 23, 2013
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    F11 does that. It only shows each device once.
     
  12. Carlos Detweiller

    Carlos Detweiller MDL Spinning Tortoise

    Dec 21, 2012
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    Is it Windows RT device?
     
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  13. Droogie128

    Droogie128 MDL Novice

    Apr 23, 2013
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    Yes. Windows RTM.
     
  14. Droogie128

    Droogie128 MDL Novice

    Apr 23, 2013
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    Is it secure boot? That's the only thing in the boot menu of the bios that doesn't really explain what it does.
     
  15. Carlos Detweiller

    Carlos Detweiller MDL Spinning Tortoise

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  16. Carlos Detweiller

    Carlos Detweiller MDL Spinning Tortoise

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    SecureBoot requires GPT, so that must be disabled. It may even be the option to disable UEFI does only display once it is disabled (and maybe the device rebooted).
     
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  17. Droogie128

    Droogie128 MDL Novice

    Apr 23, 2013
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    I honestly have no idea. I didn't know having a UEFI bios would mess me up this much, lol. I have no idea how to disable it for windows installation.
     
  18. Droogie128

    Droogie128 MDL Novice

    Apr 23, 2013
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    Secure boot is disabled by default. The bios doesn't have anything to disable uefi. Typing this in my phone. In the bios of the computer now.
     
  19. Droogie128

    Droogie128 MDL Novice

    Apr 23, 2013
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    Sorry, I just have no idea what GPT and MBR and all that stuff mean. I've never had a problem installing windows until I got this motherboard. Google is pretty useless as far as finding info goes, too.
     
  20. Carlos Detweiller

    Carlos Detweiller MDL Spinning Tortoise

    Dec 21, 2012
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    A normal PC without an option to boot legacy? I hope that's not becoming normal.
    GPT and MBR are both ways to partition an HDD. MBR is the legacy one and has hit a size limitation recently (~2TiB). Note that's not the only restriction, it is very old.
    GPT is the modern way to partition the drive. It is required for UEFI SecureBoot and if the drive exceeds the ~2TiB size limit.
    (U)EFI is the successor to the legacy BIOS.
     
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