Add Safe Mode to Boot Options in Windows 10  

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  1. Posts : 19,215
    W11+W11 Developer Insider + Linux
       #60

    Railtech said:
    Hi Brink,

    I understand what it does and how it works. I agree that the updates are likely to blame as well. The issue was/is that these updates failed to install correctly due to the Boot Manager modification. The PC would boot but would never display the Boot Manager Option screen. Before the updates were attempted to be applied all was well and I used the PC for many months with the Boot Manager screen displaying happily at each boot.

    So my reason for posting was simply to make users aware of this. I have not attempted to reapply Option One to my system as if Windows Updates can hose the boot manager with these modifications it seems pointless to have Option One applied, don't you agree?
    Haven't had that happen to regular builds but with insider builds BOOT menu gets changed almost regularly. I have all of these entries now but have to fix or redo them after every new insider build.
    Add Safe Mode to Boot Options in Windows 10-image.png
    It's possible that during update it actually switched to Safe mode at top of list and tried to boot to it.
      My Computers


  2. Posts : 494
    Win 10 Pro x64 versions
       #61

    Brink said:
    When the computer restarts after an update, it normally should continue to boot to Windows 10 (default OS) after the 30 seconds time out period if you don't click on Windows 10 to continue.
    Yes, it should. This is an odd issue. The fact is that the boot option for Safe Mode or Windows 10 would never display. Only the spinning circles. This suggests that the default to Windows after the timeout period was unable to execute. That suggests corruption.

    To add to the mystery a bit, after the second failure I ran chkdsk /f on all partitions on the disk (an SSD) as well as SFC commands to check for corruption. All reported clean, nothing found, nothing fixed. After those procedures, I attempted to create a backup of the disk from a boot media. That attempt failed with an error stating that the backup could not read the VSS snapshot due to corruption.

    Now after this happened the third time to me I started to add 2+2 and decided that the problem was with the boot manager. So I remove the Option One settings. After that, I triggered a restart and Windows started normally as it would without Option One applied. My next step was to restart and boot the boot media and attempt the backup again and this time it completed without error.

    After I now had a good fresh backup I booted the PC into Windows again and ran the Check for Update tool which of course found the two updates mentioned before. I downloaded and installed them which required a restart/shutdown to complete so restarted the system. All worked as expected. Windows booted just fine.

    So at this point then I am hesitant to reapply Option One to this system as I fear another update may just hose it again. I liked having the option available to boot Safe Mode for sure and used it quite a bit but, I cannot risk having to spend the time necessary to restore my system when an update corrupts the boot manager. I am confident that what I am saying here about corruption is correct. If I were not, I wouldn't post it.
      My Computer


  3. Posts : 228
    Win 10 1809 LTSC
       #62

    This is amazing thank you, able to get safe mode option at boot with automated countdown, also I paired this with legacy menu, prefer that to the blue UI menu.
      My Computer


  4. Posts : 61,587
    64-bit Windows 11 Pro for Workstations
    Thread Starter
       #63

    Chrysalis said:
    This is amazing thank you, able to get safe mode option at boot with automated countdown, also I paired this with legacy menu, prefer that to the blue UI menu.
      My Computers


  5. Posts : 181
    Windows 10, 20H2 (OS Build 19042.928)
       #64

    This has happened a few times and I don't know which of the temporary files that get deleted to blame. After running Settings/System/Storage and checking all the boxes, on the next restart all I have on the boot screen is Windows 10 (with the 10 second count down) and Macrium Reflect. Both Safe Mode and Safe Mode with Networking are gone. Easy enough to add them back in, but would be nice not to have to. Thanks!

    Edit: Read through all the posts here and there's a good chance that upgrading from 1909 to 20H2 this morning had all to do with the missing entries and not the Storage cleaning. Please disregard.

    Add Safe Mode to Boot Options in Windows 10-temp-files.png
    Last edited by Homer712; 27 Apr 2021 at 20:42.
      My Computer


  6. Posts : 1
    Win 10 Pro x64
       #65

    Conversion to GPT from MBR - Installed Boot Manager missing at startup


    Hi Brink

    I used option one (I think) to load the boot manager onto my Win 10 MBR drive. All worked well until a couple of months later when I decided to convert the drive to GPT format. I appropriately changed the BIOS settings to EUFI etc and the GPT drive happily booted to Win 10 except that the MS boot option manager I had installed while in prior MBR mode failed to load and be seen prior to Win 10 loading.

    My Bios indicates that the MS Boot Manager is valid in the boot priorities list and it is listed as the first option. I have the feeling that the boot mgr display instructions still reside in the old MBR boot partition and were not transferred over to the new 100MB UEFI boot partition but I have no idea as to what to do next or simply just install a new MS boot manager for the GPT partition. I'm just to afraid of ending up with an unbootable drive.

    I tried disabling CSM thus disabling all Legacy options but the MS boot option manager section widow still did not appear. The Boot Manager instructions were originally contained the BCD file when the drive was in MBR mode so that does mean when the drive was converted to GPT mode a new default BCD file created without the MS boot manager selection instructions?

    Anyway, how do I brink back the Boot Manager?
      My Computer


  7. Posts : 61,587
    64-bit Windows 11 Pro for Workstations
    Thread Starter
       #66

    Greenspanner said:
    Hi Brink

    I used option one (I think) to load the boot manager onto my Win 10 MBR drive. All worked well until a couple of months later when I decided to convert the drive to GPT format. I appropriately changed the BIOS settings to EUFI etc and the GPT drive happily booted to Win 10 except that the MS boot option manager I had installed while in prior MBR mode failed to load and be seen prior to Win 10 loading.

    My Bios indicates that the MS Boot Manager is valid in the boot priorities list and it is listed as the first option. I have the feeling that the boot mgr display instructions still reside in the old MBR boot partition and were not transferred over to the new 100MB UEFI boot partition but I have no idea as to what to do next or simply just install a new MS boot manager for the GPT partition. I'm just to afraid of ending up with an unbootable drive.

    I tried disabling CSM thus disabling all Legacy options but the MS boot option manager section widow still did not appear. The Boot Manager instructions were originally contained the BCD file when the drive was in MBR mode so that does mean when the drive was converted to GPT mode a new default BCD file created without the MS boot manager selection instructions?

    Anyway, how do I brink back the Boot Manager?
    Hello mate,

    As a test, use option 3 to remove the old Safe Mode from boot.

    Afterwards, add it back using option 1 or 2 to see if it may work now. This will serve as a refresh for it.
      My Computers


  8. Posts : 271
    Windows 10 Pro 21H2 (19044.1706)
       #67

    Last time I tried this (late last year) it wouldn't stick but this time it worked just fine.
      My Computer


  9. Posts : 78
    Windows 10 21H2/Windows 11 21H2 (22000.100)
       #68

    As always, perfect. Functional even with dual boot Win 10 / Win11.
    I just don't know how to end:

    bcdedit / copy {Current} / d “Windows 10 Safe Mode with Command Prompt”

    If I exit in cmd or cross with a cross, the screen turns black and nothing happens. I have to give a hard restart.
    Please can anyone advise, thank you.
      My Computer


  10. Posts : 61,587
    64-bit Windows 11 Pro for Workstations
    Thread Starter
       #69

    RuLich said:
    As always, perfect. Functional even with dual boot Win 10 / Win11.
    I just don't know how to end:

    bcdedit / copy {Current} / d “Windows 10 Safe Mode with Command Prompt”

    If I exit in cmd or cross with a cross, the screen turns black and nothing happens. I have to give a hard restart.
    Please can anyone advise, thank you.
    Hello,

    It looks like you are using option 1 in the tutorial.

    Do you mean this happens after entering the command at step 2 in option 1?

    Are you able to continue with the rest of the steps in option 1?
      My Computers


 

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