Seemingly random detour into BIOS screen on startup


  1. Posts : 226
    Windows 10
       #1

    Seemingly random detour into BIOS screen on startup


    I have an ASUS laptop, seems to operate error-free, but now twice this month, upon starting, it's gone into the BIOS screen without human intervention to send it there.

    And if I recall, it doesn't resume the startup sequence by using the keys to exit with no changes and boot. It has to be powered off, then started, and it goes fine.

    I've checked the F2 key and it's not stuck. No one is touching the computer as it starts.

    Also today, there was a blue screen while the computer was being used. It's my wife's computer, so I will be collecting the event data.

    But for now, what could be causing the unwanted detour into BIOS, versus a normal start?
      My Computer


  2. Posts : 1,166
    win10 home
       #2

    Try resetting the BIOS by removing the motherboard button battery for a minute,then restart and see if it now works normally.
    For the blue screen,have a look at your Reliability History to check for any problems and also go to Device Manager and see if the Display Adapter has a flag.
      My Computer


  3. Posts : 4,547
    Windows 11 Pro 64-bit
       #3

    The CMOS battery failure can cause computer to boot into BIOS setup utility.
      My Computer


  4. Posts : 12,470
    Win10 Version 21H2 Pro and Home, Win11 Pro
       #4

    FreeBooter said:
    The CMOS battery failure can cause computer to boot into BIOS setup utility.
    So can cookie and toast crumbs under the keys, canned air for the purpose to clean the keyboard helps.
      My Computers


  5. Posts : 1,166
    win10 home
       #5

    FOR FREEBOOTER
    Temporarily removing the cmos battery is to reset the bios.Nothing to do with battery failure.
      My Computer


  6. Posts : 4,547
    Windows 11 Pro 64-bit
       #6

    joeandmarg0 said:
    FOR FREEBOOTER
    Temporarily removing the cmos battery is to reset the bios.Nothing to do with battery failure.
    Why does OP need to remove the CMOS battery OP can reset BIOS to its factory setting from BIOS setup utility.

    Also i was talking about battery failure nothing to do with your suggestion to OP.
      My Computer


  7. Posts : 226
    Windows 10
    Thread Starter
       #7

    Update:

    There have actually been several BSODs with this - Windows 10 is so "gentle" in its presentation of them that my wife missed the ramifications.

    I tried several times to view the event logs and make sense of it. There were several "disk" errors associated with the blue screens (that is, a "disk" error would have occurred at around the time of a logged critical error).

    Roughly 3-4 times in 10 minutes, I'd be running the event viewer, and midview, it would go into a blue screen restart.

    The restart would then throw me to the BIOS screen.

    Pressing escape would simply briefly resume the boot sequence, but then put me in the BIOS screen again. Pressing F10 to save the configuration and start would generate a confirmation question, but then would not leave the BIOS settings.

    Using the power button to restart would move me through a normal-looking start.

    After all this, I ran chkdsk /r /f and it ran through over the course of 75 minutes or so, restarted, and my wife has been watching Netflix on it with no more interruptions. I have not checked the chkdsk log to see what happened.

    There seems to be so much "non-good" stuff at work here though, that I'm just going to take it to our very trusted computer shop for a thorough go-over.
      My Computer


  8. Posts : 226
    Windows 10
    Thread Starter
       #8

    The computer shop called, and it's the hard drive.

    We're replacing it with an SSD - should show a nice speed improvement.

    And they did capture a full image of the existing drive, so hopefully little or nothing of consequence will be lost.
      My Computer


  9. Posts : 226
    Windows 10
    Thread Starter
       #9

    This journey was a much longer one than I'd ever hoped or bargained for.

    The computer got a new SSD, with a cloned image of the prior drive.

    But it was very randomly BSOD-ing, and not saving dump files or logging the trigger events.

    I took it back to the shop, and of course since the blue screens were random, they couldn't reliably reproduce the error(s), so everything took a long time.

    They put in a NEW SSD with the cloned image, and that too kept blue screening.

    Did an in-place Windows installation. Still blue screening.

    Finally did a clean install, then a manual copying of the document and data files, and now it's fine.

    So somehow, some key file must have been damaged in the bad HD, not detected with SFC or CHKDSK, not replaced during the in-place install, but properly replaced during the clean install.

    Anyway - finally working again.
      My Computer


 

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