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Downgrade 8 to 7 on Acer Aspire AXC-603G-UW31 I Need Help!

  1. #141


    Posts : 18
    Winodws


    Quote Originally Posted by Majicmazo View Post
    Quote Originally Posted by Rainey222 View Post
    Quote Originally Posted by Majicmazo View Post
    Thats not going to work, there is no windows 7 drivers and the bios doesnt have csm, only way to do it is to get the modifed bios with the csm option that amohani posted earlier
    That is not correct, that latest offical BIOS does have CMS support and is working. But you are correct that the windows 7 drivers are not on the ACER page, but youy can get the the drivers posted in this thread and once installed you can use the hardware ID to find more current drivers.
    I downloaded the BIOS from the Acer site and it did not have CSM, the only Bios that worked for me was this modded bios posted by amohani
    Well not sure waht PC you are using but for the PC this thread is about the only non L BIOS listed at that link states it supports CMS
    Attached Thumbnails Attached Thumbnails Capture.JPG  

      My System SpecsSystem Spec

  2. #142


    Posts : 2
    Win 8.1


    I'm having problems getting Win 7 installed. I followed the instructions in amohani's post -- downloaded the bios files, extracted, ran flash.bak, the command prompt screen popped up and ran through the processes. I restarted the pc and went into the bios settings, changed the settings as in amohani's post (turned off secured boot, changed CSM to always, changed boot priority to USB first, DVD second, hdd third). I made a bootable USB stick with Rufus. I also mad a bootable DVD using ImgBurn in case the usb method didn't work. Inserted the USB and rebooted. The Acer screen comes on and then goes to a black screen. The pc won't boot, so I tried the DVD and still nothing. I had to remove the battery on the mobo to get it to start booting from the HDD again. Any suggestions?
      My System SpecsSystem Spec

  3. #143


    Posts : 2
    Win 8.1


    Anyone?

    Quote Originally Posted by narb View Post
    I'm having problems getting Win 7 installed. I followed the instructions in amohani's post -- downloaded the bios files, extracted, ran flash.bak, the command prompt screen popped up and ran through the processes. I restarted the pc and went into the bios settings, changed the settings as in amohani's post (turned off secured boot, changed CSM to always, changed boot priority to USB first, DVD second, hdd third). I made a bootable USB stick with Rufus. I also mad a bootable DVD using ImgBurn in case the usb method didn't work. Inserted the USB and rebooted. The Acer screen comes on and then goes to a black screen. The pc won't boot, so I tried the DVD and still nothing. I had to remove the battery on the mobo to get it to start booting from the HDD again. Any suggestions?
      My System SpecsSystem Spec

  4. #144


    Posts : 3
    Windows 8


    I too am having problems...I right-click the flash.bat and it quickly opens and closes a cmd prompt but it doesn't seem to actually change the bios. I went in and it says P11-BO version for the bios. I did a clean restore of the system and same problem. The bios from this forum is the only one that will work, correct? I am a bit confused now that maybe an official version from Acer is able to be used when downgrading to Windows 7?

    Edit: Figured out to just double click the file instead of right clicking. Now when installing windows it says it cannot because it is in GPT. Do I need to format the drive or something? I followed the instructions and am using what I believe is a 64-Bit Windows Home Premium disc.
    Last edited by xxxberto55; 18 Feb 2015 at 17:03.
      My System SpecsSystem Spec

  5. #145


    Posts : 879
    Windows 10


    Quote Originally Posted by xxxberto55 View Post
    Now when installing windows it says it cannot because it is in GPT.
    Quote from this post: UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style). -> link

    Tip   Tip
    Error message when you boot from the Windows installation media in Legacy BIOS Boot Mode:

    Windows cannot be installed to this disk. The selected disk is of the GPT partition style. (see screenshot below)

    That is because Windows can only be installed to MBR disk in Legacy BIOS Boot Mode, but you plan to install Windows on a GPT disk.

    - Boot from the Windows installation media in UEFI Boot Mode, so you can use GPT (GUID Partition Table).
    - But if you want to use MBR (Master Boot Record) partition table, then delete all partitions on the disk.

    Click image for larger version

    Error message when you boot from the Windows installation media in UEFI Boot Mode:

    Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks. (see screenshot below)

    That is because Windows can only be installed to GPT disk in UEFI Boot Mode, but you plan to install Windows on an MBR disk.

    - Delete all partitions on the disk, so you can use GPT (GUID Partition Table).
    - But if you want to use MBR (Master Boot Record) partition table, then boot from the Windows installation media in Legacy BIOS Boot Mode.

    Click image for larger version
    Last edited by genet; 13 Nov 2015 at 13:37.
      My System SpecsSystem Spec

  6. #146


    Posts : 3
    Windows 8


    I am assuming from following the instructions that I was booting in UEFI Mode to a GPT disk but will double check.

    I assume it's a setting in the bios?

    Also, if I delete all the partitions on the drive, I assume I lose the ability to use the recovery software to return the computer to factory state?
      My System SpecsSystem Spec

  7. #147


    Posts : 3
    Windows 8


    Deleted all the existing partitions and it's a go! So the end result is running UEFI with AHCI, correct? SSD should be here today so probably will have to repeat but now I know how to do it. Thanks.
      My System SpecsSystem Spec

  8. #148


    Posts : 1
    Windows 7


    Cant seem to get it the graphic driver to work and cant get my hdmi to work. Can anyone help
      My System SpecsSystem Spec

  9. #149


    Posts : 12
    Windows 8.1


    This is the latest working video driver:
    https://www-ssl.intel.com/content/ww...area=Downloads

    Get the latest audio and LAN drivers directly from the Realtek site.

    As for other recent questions, no, don't use UEFI or GPT for Win 7 installs.

    Also you can save some trouble by simply using the latest BIOS from the Acer support site a few posts up which you can easily run from within Windows.

    And all the Win 7 64-bit drivers are finally available on Acer's site:
    Download Drivers and Manuals | Acer Official Site
    Last edited by mdavej; 28 Apr 2015 at 11:26.
      My System SpecsSystem Spec

  10. #150


    Posts : 5
    Windows 7 Ultimate x64


    Thank you amohani for your great post! I followed each step, and managed to get Windows 7 installed, up and running!

    But ever since the update, I cannot access the BIOS again. I don't see the Acer splash screen logo, it just boots straight to Windows 7. I am using HDMI, and have been using HDMI from the start. But before the BIOS update I did not have any problems of seeing the boot screens or accessing the BIOS.

    I also have a XC-603 NOT a XC-603G ...

    1. Could it be that this "custom" BIOS disabled my access to the BIOS?
    2. Is it safe for me to flash with the official P11.B2 BIOS, now that I have Win7 up and running? <-- will this let me access BIOS again,or can this risk a lockdown?
      My System SpecsSystem Spec

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Downgrade 8 to 7 on Acer Aspire AXC-603G-UW31 I Need Help!
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