Windows 8 and 8.1 Forums


Stange Issue with uEFI and Bios on Acer AO756 Netbook

  1. #1


    Posts : 9
    OSX 10.6.8

    Stange Issue with uEFI and Bios on Acer AO756 Netbook


    Id like to start of by going ahead and admitting i was an idiot for doing what i did, Give a little bit of a back story etc.

    I had been dual booting between Linux Mint 16 and Windows 7 x64 Ultimate in the following partition scheme on my

    Acer Aspire AO756 1.4Ghz Celeron Processor, 4GB ram, 320gb HDD. (shipped with windows 7 HP)

    All Primary partitions:
    {sda1 Windows Boot Loader}{sda2 Windows 7} {sda3 Storage (NTFS)}{sda4 Linux Mint 16}

    I managed to somehow get a virus under windows and after failing to weed it out i just formatted the partition SDA1 and SDA2 and reloaded grub : all was well at this point.

    Then i got the crazy idea to try out Windows 8.1 since you can still do the 30 day evaluation, and since shortly after i bought my PC, they started shipping out the 'same' (ive found out it had a different BIOS and Processor) model with windows 8 and when i type in my serial on the Acer website for drivers, it brings up Windows 7, Windows 8 and Windows 8.1 drivers. Just to see if it was indeed faster on my acer. THIS proved to be a bad idea as i did not know about the secure boot implementation in windows 8.1. I had tried the RTM test build of 8 a while back and it was not impressive enough to keep. However i had hopes for 8.1. It installed fine and dandy, but during the install sequence it needs you to reboot. When the PC rebooted it could not find any bootable partitions on the drive. I hard rebooted and Hit f12 to get to the Boot selection in the bios and lo and behold there was EFI Boot Partition for windows, Selected that and it booted and continued the set up procedure.

    After using it for a few minutes, i started to collect my drivers, only to find out the GPU driver did not work on windows8 for my integrated intel card... Meaning i had terrible tearing and artifacts, moving windows or watching movies would give you a head ache etc.

    So i tried to REMOVE windows 8.1 and reload windows 7, simple procedure right ? WRONG
    Ive formatted, even zeroed out the HDD over and over again.
    No bootable device found error every time
    I cannot boot from the Windows 7 Disk via USB CD drive, i cannot boot from a USB key made with it either.

    I can only boot the windows 8.1 key i made, or Ubuntu in EFI mode.

    If i install ubuntu, it still wont boot right away, and i have to go to f12, select the efi boot Ubuntu Selection etc.




    There are no secure boot, or efi options in my bios, and i think that Secure Boot is whats locking me out of fixing my own pc >< What gives ?
    I thaught maybe it wrote something to the BIOS (odd as that sounds, i figured i had nothing to loose) So i reinstalled windows 8.1 (cause thats the only damn thing i can actually install anymore) and reflashed the BIOS version 1.09 from Acer thinking that would help...

    Still a no go, Im at whits end, with a Brick....
    So im having to sit here and type this out on an old, barely fuctioning ibook, hopeing that someone out there knows something... Google has turned up very little other than "congratulations on your new paperweight courtesy of windows 8.1"

      My System SpecsSystem Spec

  2. #2


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    Have you made the OEM manufacturer's Recovery Disks?

    information   Information
    We always assume you have made your Recovery Disks using the OEM manufacturer's Recovery Media Creator app the first day you had your new PC.
    & made the Startup Repair CD.
    startup repair disc-create


    Did you make the OEM manufacturer's Recovery Disks?

    Click image for larger version


    To clean install:
    1) Clean the HD Drive, using Step one in this tutorial:
    SSD / HDD : Optimize for Windows Reinstallation - Windows 7 Help Forums
    than
    2) clean install with the OEM manufacturer's Recovery Disk.
      My System SpecsSystem Spec

  3. #3


    Posts : 9
    OSX 10.6.8


    @theog
    I tried unsuccessfully once or twice when i got the PC (it took three returns to the store to even get one that would even boot :S)
    when i had too many issues with the acer preinstalled System i gave up (mouse freezing, random reboots, sluggishness etc, the third laptop couldnt stay up without blue screening long enough for me to even set up a user account) formatted it and installed the copy of win7 we had.

    I also dont get why that would Work, but various other methods would Not. A defualt windows flashdrive should boot right ?
    Or Xubutnu or linux mint, etc.

    ive tried diskpart to clean the drive, i have Zeroed out the drive and repartitioned it under OSX, and under someone else's PC running windows XP (zeroed on that with CCleaner)

    I did just try the HDD from my old laptop in there for giggles and it DID actually boot.

    So it seems that any disk that even touched Windows 8 has somehow been corrupted so bad i cannot use it ? (2 flashdrives i can no longer boot from, and the main HDD from the Acer)
      My System SpecsSystem Spec

  4. #4


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    You could try doing a clean all with diskpart. Disk - Clean and Clean All with Diskpart Command - Windows 7 Help Forums
      My System SpecsSystem Spec

  5. #5


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    This one of biggest problems you get after installing Linux on HDD.
    Hopefully CLEAN ALL will kill all Linux code.
      My System SpecsSystem Spec

  6. #6


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    Usually you get one and only one chance to make the recovery Disks, and that should be done immediately when you unbox the system.

    The HP Pavilion I just set up made a 6 DVD backup set, and I backed it up on 2 computers just to be safe. Didnt have 3 DL DVDs.
      My System SpecsSystem Spec

  7. #7


    Posts : 9
    OSX 10.6.8


    @ alphanumeric
    i already have cleaned the disk with diskpart as stated in my second posting.

    @ theog
    This is not an issue with linux code, this is an issue with windows and its implementation of secure boot.
    I can even take out the HDD, i still cannot boot anything from USB unless its EFI. Windows 7 Boot disks, while containing EFI loaders, always seem to default to the old scheme and will not even show up as EFI boot devices

    @ XweAponX
    Yes and i stated i tried to do that, however the acer recovery service failed to make working backups. It would freeze or crash and never complete making the backup USB key.


    ***************************************

    My windows 7 and linux USB keys Boot fine on other computers. Something happened after installing windows 8.1 that is preventing me from booting any USB devices, unless its a EFI device, im dead in the water. *no bootable device found* even though the USB keys work on my families desktop, and they worked on the laptop BEFORE installing windows 8, same drives. I can set USB to be the first boot device, i can even take out the HDD of the laptop, but i still cannot get anything else to boot VIA usb other than the windows8.1 Flash drive.

    I have cleared out the CMOS memory
    I have refreshed the BIOS
    i have Zeroed out the hard drive many many times
    i have run memtest of a ubuntu key to rewrite everything on ram (though it should clear when it looses power anyways)

    there should be nothing left of the windows 8 and the EFI Secure boot implementation, Yet there is somewhere.
    Basically its like the 'Fastboot' part of EFI is implemented, but i have no options in BIOS to turn it off. Its almost like it does not even check the USB drives for a partition to boot from.

      My System SpecsSystem Spec

  8. #8


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    OK, you mentioned diskpart but I wasn't sure if you did a clean or clean all. I would think zeroing the drive should have done the same thing anyway. I've installed just about every version of Windows 8 and had no problem going back to 7. Haven't tried it after installing 8.1 though, as I actually like 8.1. If you haven't already, I would reset your BIOS to defaults and try booting from one of your thumb drives again. On my ASUS laptop I get two listings for my thumb drive in the boot menu, one with UEFI in front of it and one without. You should be able to turn UEFI off in the BIOS.
      My System SpecsSystem Spec

  9. #9


    Posts : 9
    OSX 10.6.8


    Quote Originally Posted by alphanumeric View Post
    OK, you mentioned diskpart but I wasn't sure if you did a clean or clean all. I would think zeroing the drive should have done the same thing anyway. I've installed just about every version of Windows 8 and had no problem going back to 7. Haven't tried it after installing 8.1 though, as I actually like 8.1. If you haven't already, I would reset your BIOS to defaults and try booting from one of your thumb drives again. On my ASUS laptop I get two listings for my thumb drive in the boot menu, one with UEFI in front of it and one without. You should be able to turn UEFI off in the BIOS.

    I have done the following to the BIOS.
    I have Reflashed them to versions 1.08 and 1.09
    I have reset the bios to default settings in the bios.
    I have HARD reset the bios using the Cmos Jumper on the Motherboard.

    no Dice : i still cannot boot from anything other than the Windows8.1 and the UFI Ubuntu Stick.
    EVEN if i install them to the systems hard drive, they will not boot unless i hit f12 at boot and select the UFI Loader in the list (ufi drives are also, not listed in my bios as a item to enable or disable, or even change the load order for)

    There are NO uEFI settings in my bios, there are no Secure Boot settings in my bios. Im honestly not understanding how windows even implemented secure boot on my machine
      My System SpecsSystem Spec

  10. #10


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    For my ASUS its listed as UEFI Boot in the Boot section. On my wife's Acer laptop its set under the "Boot Mode" option in the Boot section. There are also some Secure Boot options in the Security section of the BIOS on her Acer.
      My System SpecsSystem Spec

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