How to clean up BCD entries? Rebuild the BCD?

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  1. Posts : 502
    Microsoft Windows 10 Home 64-bit 18363 Multiprocessor Free
    Thread Starter
       #11

    I don't know why D: and F:.
    could it because the machine has 4 disks in it, as you can see from the disk management tool.

    1. PCIe- PM981 that is the primary windows 10 boot disk
    2. PCIe - PM981 that is the clone windows 10 boot and does not boot via the BCDedit settings, I have to hit F11 and boot there.
    3. Samsung 860, just a data disk
    4. Samsung 960, has Ubuntu on it (the 1st option in the boot menu).


    Anyway, this fails as you can see the error message:

    bcdboot /bcdclean full
      My Computer


  2. Posts : 2,790
    Linux Mint 20.1 Win10Prox64
       #12

    RolandJS said:
    Why is Windows on F and D, and not C where it probably should be? Or, is that part of the bogus BCD entries?
    This is normal that under Recovery Environment, The letters are re-assigned. This is why you have to be careful and select the correct one.
    @dictum
    Advice: Never use Easy BCD with Windows installed using GPT disk. Use Easy UEFI instead provided you know what you are doing. Easy BCD only works with MBR disk type.
    Base on the screen shot above. Your disk 0 is your new Windows and your disk 1 contains the old Windows. Disk 3 contains a 512MB Fat32 partition and I don't know what that is. I suggest you disconnect disk 3 for now before proceeding.

    Let rebuild new BCD's for both disk 0, and disk 1. Please follow step by step on the 2 screen shots below. On step 3, write down the drive letter for PM981_New. In the screen shot, My Windows is still assigned to C but it might be different from yours. In step 10, if the drive letter is different than C, then use the letter in step 3.

    Do exactly the same for disk 1, this time select disk 1 in step 4 and assign letter V in step 7, Use V and the drive letter for Old Windows in step 10. This will create a new BCD for PM981_Old and you will be able to boot separately from boot menu.

    From boot menu, select which one to boot from.
    Once booted into Windows. If you wish, you can set up dual boot for Windows old & New. Under This PC, look for the drive letter of the offline Windows and type:
    bcdboot X:\Windows where X is the letter of the offline Windows

    How to clean up BCD entries?  Rebuild the BCD?-p1.jpg
    How to clean up BCD entries?  Rebuild the BCD?-p2.jpg
      My Computer


  3. Posts : 1,614
    Windows 10 Home
       #13

    Topgundcp, I totally forgot about the letter reassignment by external booting - thanks for the reminder :)
      My Computer


  4. Posts : 502
    Microsoft Windows 10 Home 64-bit 18363 Multiprocessor Free
    Thread Starter
       #14

    How do I remove *all* BCD entries and just have the computer boot into the operating system without giving a choice?

    I no longer want to make it multi-boot, have multiple OS' on it, turn the button have it go straight into Windows.

    Is it as simple as firing up bcdedit and removing the current entries?

    How to clean up BCD entries?  Rebuild the BCD?-image.png


    How to clean up BCD entries?  Rebuild the BCD?-image.png
      My Computer


  5. Posts : 56,064
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #15

    dictum said:
    How do I remove *all* BCD entries and just have the computer boot into the operating system without giving a choice?

    I no longer want to make it multi-boot, have multiple OS' on it, turn the button have it go straight into Windows.

    Is it as simple as firing up bcdedit and removing the current entries?

    How to clean up BCD entries?  Rebuild the BCD?-image.png


    How to clean up BCD entries?  Rebuild the BCD?-image.png
    Much easier and safer to use MSCONFIG.EXE. Here's what I have. Multiple multi-boots. It's a good example for this.

    Highlight the entry to remove and click delete. That is equivalent to manually messing with the bcddata. When all done, you can then safely delete any unneeded partitions.

    After MSCONFIG operations, reboot to verify before you delete any partitions.

    How to clean up BCD entries?  Rebuild the BCD?-2020-03-11_11h43_37.png
      My Computers


  6. Posts : 502
    Microsoft Windows 10 Home 64-bit 18363 Multiprocessor Free
    Thread Starter
       #16

    It's showing just one choice:

    How to clean up BCD entries?  Rebuild the BCD?-image.png


    The machine has this weird behavior, it does not reboot. When it tries to reboot, it does not find the disk at all and just hangs at the MSI prompt (MSI GT80 Titan laptop).
    I have to hit CTRL-ALT-DEL to force it to start over. At that point, I get the black screen with:
    Windows failed to start. A recent hardware or software change might be the cause. To fix the problem:
    1. Insert your Windows installation disk and restart your computer.
    2.
    3.
    Status: 0xc000000f
    At that point, I hit CTRL-ALT-DEL once again and _then_ it boots.

    And the next time I reboot, I have to go through the above procedure again.
      My Computer


  7. Posts : 56,064
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #17

    That "0" timeout is unusual since the default is 3 seconds. Change that back to 3, and restart. Even with only 1 OS in the config, it should go straight to it. The other errors you mentioned may make this meaningless, if you have other issues, like corrupted boot recs. But try first.
      My Computers


  8. Posts : 264
    Windows 10
       #18

    EasyBCD is not showing them because your are using UEFI.

    UEFI remove unwanted boot entries from BIOS solved easily
      My Computer


 

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