Can't access Asus P5LD2 BIOS after Windows 10 update Threshold 2 10586

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  1. Posts : 83
    Windows 7 Ultimate 64-bit SP1
       #1

    Can't access Asus P5LD2 BIOS after Windows 10 update Threshold 2 10586


    Hi Folks. Last summer I updated Windows 7 to Windows 10 Threshold 1 10240 on this old Asus P5LD2 motherboard based system I use for testing from time to time. I just updated it to Threshold 2 10586, and now I find I can't access BIOS boot settings anymore via the F2 key.

    The only solution I can find on this refers to disabling Secure Boot in articles like this one or like this one that involves systems with a UEFI based BIOS.

    Everything I can find refers to restarting Windows 10 and selecting:
    Troubleshoot > Advanced Options: UEFI Firmware Settings

    However there's no such menu when I go there since there is no UEFI on this old CSM based motherboard.

    Has anyone run into this issue and perhaps found a solution?

    Thanks for any feedback.
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  2. fireberd's Avatar
    Posts : 2,349
    Win 10 Pro, 20H2
       #2

    The fast boot is the issue, even on non UEFI BIOS'.

    One option is to boot up then "Restart" and on the restart you can access the BIOS.
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  3. Posts : 83
    Windows 7 Ultimate 64-bit SP1
    Thread Starter
       #3

    fireberd said:
    The fast boot is the issue, even on non UEFI BIOS'.

    One option is to boot up then "Restart" and on the restart you can access the BIOS.
    This is the place to get quick, accurate answers about Windows issues. I'll be back.

    I had disabled fast boot in power settings as per other advice, but just doing that didn't get me to BIOS on a cold boot.

    Thank you so very much for that fireberd.

    EDIT: You said that was one option. I wonder it there's another that doesn't involve having to boot into Windows 10 first.
    Last edited by ohante; 28 Mar 2016 at 07:37.
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  4. fireberd's Avatar
    Posts : 2,349
    Win 10 Pro, 20H2
       #4

    I don't know if there are more options. Just one that I know has worked for me.
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  5. Posts : 83
    Windows 7 Ultimate 64-bit SP1
    Thread Starter
       #5

    Did the Windows 10 10586 update insert code into the BIOS to enable Fast Boot and Secure Boot, and resulting in this issue? I was wondering if backing up BIOS and flashing it again with the newest again would fix things. But I'm wondering too if that might result in Windows 10 not being able to boot at all... the reason I'd hope restoring the BIOS backup would fix things. Though I see articles saying restoring BIOS backups is not always possible or advisable.
    Last edited by ohante; 28 Mar 2016 at 17:35.
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  6. Posts : 538
    Windows 10 Pro x64 1903
       #6

    Disconnect your hard disk from your motherboard and try to get into the BIOS. Also is it the Delete key that enters the BIOS?
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  7. Posts : 83
    Windows 7 Ultimate 64-bit SP1
    Thread Starter
       #7

    lmaneke said:
    Disconnect your hard disk from your motherboard and try to get into the BIOS. Also is it the Delete key that enters the BIOS?
    You know, this afternoon I find I can hit DEL at boot (yes... it's DEL) and the system will boot into BIOS setup now! The other night I had found information that said I could resolve this problem by disabling fast boot. It didn't seem to work for me. But maybe when I disabled fast boot I may have needed to fully shut the system down in order to get it to stick.

    I'm still intrigued by the possibility that MS may be writing code to BIOS, otherwise I can't explain how this issue came about in the 1st place.
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  8. Posts : 538
    Windows 10 Pro x64 1903
       #8

    Fast startup does definitely write to the BIOS in terms of the boot order in old legacy systems. If I have fast startup enabled, I can't boot to a CD or USB drive, even if it's set as the CD or USB first in the BIOS. Fast startup is a hybrid sleep/hibernate feature, which logs you off the system, and then saves all the system information into the hiberfil.sys file. Once the computer is turned back on, it's almost like resuming from sleep or hibernate, but still posting for initialization of devices, and then boots from the hiberfil.sys file for faster boot.

    Secure boot will not be on your machine. Secure boot is only on UEFI systems only. And Secure boot is only designed for Windows 8 and 10.

    I've owned a lot of ASUS Motherboards and have been happy with all of them.

    Right now I have Windows 10 on my ASUS M5A99FX PRO R2.0 with an AMD FX-6300 CPU. Runs awesome
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  9. Posts : 83
    Windows 7 Ultimate 64-bit SP1
    Thread Starter
       #9

    lmaneke said:
    Fast startup is a hybrid sleep/hibernate feature, which logs you off the system, and then saves all the system information into the hiberfil.sys file. Once the computer is turned back on, it's almost like resuming from sleep or hibernate, but still posting for initialization of devices, and then boots from the hiberfil.sys file for faster boot.
    Wow... booting is significantly faster with fast boot set. That's nice. While I was turning that on and off to test speeds, I discovered with fast boot set, I can hit F8 and at least have setup present a menu I can select a drive to boot from.

    This was very inexpensive board I got on sale with an Intel CPU way back, and my 1st Asus. Perhaps because of the low cost, the BIOS has always been flaky, esp when it comes to detecting USB drives. Even with SATA drives there have been times when I had to disconnect all of them, and then add them back and boot them one at a time before it recognized them all properly. Or maybe that was me... I forget a lot if I let a number of years go by without working on these systems. I do know Asus boards have generally been well reviewed through the years. I got an MSI the last time I built a new system and have been very happy with it.

    Now it's off to update my newest, a Win10 Toshiba notebook from 10240 to 10586, which was the whole reason I did this dry run on the old Asus. Hopefully that goes a bit more smoothly. It was kind of a dry run on these forums too. Glad to be getting some informed and accurate feedback here.
    Last edited by ohante; 29 Mar 2016 at 04:59.
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  10. Posts : 538
    Windows 10 Pro x64 1903
       #10

    Do be careful with the upgrade. If your laptop seems sluggish after upgrade, let me know. The upgrade does cause some issues
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