Windows 8 and 8.1 Forums

UEFI

  1. #1


    N.Y.
    Posts : 2,214
    Windows 10 Pro 64bit

    UEFI


    I used Windows 8 upgrade assistant before installing Win8 Pro.The message i received on compatibility was only one problem.Your PC Firmware doesn't support secure boot so you won't be able to use it in Windows 8.Secure boot requires firmware that supports UEFI v2.3.1 Errata B and has the Microsoft Windows Certification Authority in the UEFI signature database.Sure anyone who has UEFI like me received this message using this upgrade assistant.Through many hour and days of research on internet and other forums nobody seems to know how i can update my firmware,neither ASUS could advise me or Microsoft.To me i figured it should be a BIOS update,but no new ones are available for my system.Since i had no answers i decided to just to do the install of Windows 8 Pro 64 bit (clean install) works well,faster then Windows 7.So far i like it.Only clue i have at this point was a site i found.Knowing my BIOS is a American Megatrend i found this site,but theydo not support other motherboards AMI | American Megatrends Inc. : AptioŽ V ,but this is closest clue i got.BIOS stuff and flashing it can always be risky,rendering the motherboard inoperable,causing major issues,that i do not want to do if it will cause me this.If anyone knows anything on this and can help with it would be very much appreciated i am stumped on this,i would like to take full advantage of my system,for now i can not.I know my BIOS mode is set to legacy and it does say in system info secure boot state Unsupported.In my ASUS UEFI BIOS UTILITY setup all i see is in the boot menu is PCI ROM Priority,settings is either Legacy ROM or EFI Compatible ROM,i see no settings for secure boot. My Model PC is ASUS CM6730-US-2AC motherboard is P8H61-M-PRO Windows 8 Pro 64bit.Brink if you read this i was referred by Quickdraw Bleeping Computer Technical Support .ty
    Last edited by jds63; 22 Sep 2013 at 20:01.

      My System SpecsSystem Spec

  2. #2


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


    Sounds like your PC is to old to have a UEFI/BIOS firmware update for Secure Boot.
      My System SpecsSystem Spec

  3. #3


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


    I do believe you can still install in UEFI mode, even without secure boot. There are forum members that have secure boot disabled so they can dual boot with Linux etc. As far as I know they still use UEFI. I'd try it and see what happens. With 8.1 I think you'll get a watermark in the lower left of the screen saying Secure Boot is disabled but Windows will still run. I would not flash with a BIOS from any other source other than ASUS. The odds are very high that you'll brick your motherboard doing that.
      My System SpecsSystem Spec

  4. #4


    Posts : 1,121
    Windows 8.1 x64


    I have one motherboard (P8Z68) that is UEFI but not secure boot capable. Another one, a P8Z77, is fully Secure Boot Capable.

    Alphanumeric is correct and you should be able to install using UEFI. At one time my older motherboard actually had a Windows 8 UEFI option, but it was later removed by subsequent bios updates.

    But the options you need to look for are CSM or Compatibility Support Module that has to be disabled for Secure Boot and Secure boot, which might have options for UEFI or Legacy.

    The OpRom options are for other things, such as Video Cards. I had to get a special UEFI bios for my GTX 680 to be able to boot into Windows 8 Secure Boot.

    The link below might explain some things. Even if you do not have Secure Boot you still have Trusted Boot or Measured Boot, I am not sure of which terms are more accurate, but the system checks other components for problems. But after the initial boot phase, the second part comes into play with or without the Secure Boot being enabled.

    Windows 8 and Secure Boot - Demo, UEFI, PC, BIOS | TechNet
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  5. #5


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


    I can confirm that CSM is disabled on my ASUS laptop that has UEFI. It was disabled by default when I got it. Enabling or Disabling it doesn't seem to have any effect, not on my system with Windows already installed in UEFI.
      My System SpecsSystem Spec

  6. #6


    Posts : 1,121
    Windows 8.1 x64


    I went and checked the motherboard you list and it appears to have the bios on a "32 Mb Flash ROM". I believe it takes a 64 Mb flash ROM for the System to be able to use the advanced Bios Options. This is the reason EVGA states for not being able to convert earlier Video cards to UEFI capable.

    The ASUS site does not always show updates for modifications on some boards, so yours may be different.
      My System SpecsSystem Spec

  7. #7


    N.Y.
    Posts : 2,214
    Windows 10 Pro 64bit


    O.K. first off what are advantages if i can install in UEFI without secure boot? Yes i know system is UEFI old or new type.No i did not want to flash the BIOS if i did not need to,ASUS is no help,no new BIOS anyway.I do not see anything in BIOS that says secure boot or CMS.Only legacy option i see is in PC ROM Priority which i believe you said is for video card.I can go to advanced options,either EZ mode or Advanced Mode.Is this same you mean for 64mb flash ROM?ASUS is not much help,on phone will not advise you to flash a BIOS or anything else to a system,just tell you where to find it.Plus ASUS will show to support download pages,one for PC one for motherboard which show different BIOS's,drivers and Utilities.So this can be very confusing on which would be right for Windows 8.In boot when press f8 i see option to boot UEFI if that says anything,otherwise if you can lead me where else to look in BIOS.This may be a lost cause all together,if there is no big advantages to having UEFI without the secure boot then see no reason to bother,someone told me to contact Brink form another forum,but i appreciate the help,thank you.
      My System SpecsSystem Spec

  8. #8


    Posts : 1,121
    Windows 8.1 x64


    Because of the small Bios chip, I assume you only have a Faux UEFI Bios and will not be able to do the full Windows 8 secure boot, although I do not know for sure that is the case.

    There are many places that explain the UEFI bios and what advantages it might give you. I like UEFI because it uses a GPT configured hard drive and I don't have to worry if I need to add an additional partitions. But otherwise, there is not really that much difference. Your reading on the subject should clear that up.
      My System SpecsSystem Spec

  9. #9


    N.Y.
    Posts : 2,214
    Windows 10 Pro 64bit


    Thanks for the reply.Well i do not know either for sure all i can give is my specs from the PC.ASUS motherboard P8H61-M-Pro PC ASUS Model CM6730,originally listed CM6630_CM6730_CM6830.Intel Core i5-2320 CPU@ 3.0 GHZ 4 Cores 4 Logical processors.Yes i did do alot of research been learning alot,before i ever posted in forums for help,so without option of secure boot as some said here,doing a UEFI install without it the only advantages are the ones you listed then?So basically no speed increase other type advantages using UEFI over MBR?Truthfully this is and has come to a point of frustration,that most likely it is not possible with this system or a firmware update or a BIOS update.All i see in BIOS was in advanced mode tabs are Main,advanced,boot and tool.Main is CPU config.,PCH Config.,Sata Config,USB Config.,System Agent Config.,Onboard device config. and APM.Boot tab was the PCI Priority which we went over choices were Legacy ROM or EFI Compatible ROM.So i see no other mention of CMS or EFI except titled in BIOS screen,except for when i exit BIOS to save or disregard changes one choice at bottom says Launch EFI shell from file system.Someone told me to ask Brink on another forum,but i never talked to him,i am sure all you guys are very knowledgeable if you can ask him to appreciate it.If this UEFI fails to be done i'll stay were i am at.
      My System SpecsSystem Spec

  10. #10


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


    disregard changes one choice at bottom says Launch EFI shell from file system
    No need to Launch EFI shell with Windows 7 or 8, will AUTO Launch with Windows 7 or 8 DVD booted in UEFI mode.

    Click image for larger version
      My System SpecsSystem Spec

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