Windows 10: How to fix BCD for Dual Boot System

Discus and support How to fix BCD for Dual Boot System in Windows 10 Installation and Upgrade to solve the problem; My bootloader is corrupted (I think the last Insider upgrade did it). I have the correct two Win 10 installations listed (my Win 10 production system... Discussion in 'Windows 10 Installation and Upgrade' started by fireberd, Dec 3, 2019 at 10:22 AM.

  1. fireberd Win User

    How to fix BCD for Dual Boot System


    My bootloader is corrupted (I think the last Insider upgrade did it). I have the correct two Win 10 installations listed (my Win 10 production system and the Win 10 Insider) but there are others listed, such as "UEFI IP4" and both of my DVD drives (see screenshot). I would like to clear out the invalids but don't know how. I have EasyBCD and tried to recreate the bootloader but it corrupted it (and I recovered with Macrium Reflect).

    Here is the screenshot:

    How to fix BCD for Dual Boot System [​IMG]

    :)
     
  2. Andre Da Costa, Dec 3, 2019 at 10:23 AM
    #2
  3. topgundcp Win User
    How to clean up BCD entries? Rebuild the BCD?

    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 fix BCD for Dual Boot System [​IMG]


    How to fix BCD for Dual Boot System [​IMG]
     
  4. How to fix BCD for Dual Boot System

    Windows defender offline error: EFI\Microsoft\Boot\BCD - 0xc0000185

    Hi Dave,

    Could you provide us additional information to assist you better with this issue:

    • What is the make and model of your device?
    • Have you made any changes to the operating system prior to this issue?
    • Are you able to boot the device to desktop with this error message?

    This issue might have occurred due to corruption in the boot files or BOIS unable to detect your drive to boot.

    I suggest you to refer to the below thread, check if your issue matches with the same.

    If so, try the troubleshooting steps suggested by -.[Final]#[Boss].- and check if
    it helps.

    Error code after update File:\EFI\Microsoft\Boot BCD
    Error Code 0xc0000185 BSOD


    Hope this information is helpful.
     
    SujataMoktan, Dec 3, 2019 at 10:23 AM
    #4
Thema:

How to fix BCD for Dual Boot System

Loading...
  1. How to fix BCD for Dual Boot System - Similar Threads - fix BCD Dual

  2. Fixing dual boot machine that won't boot Windows..

    in Windows 10 Ask Insider
    Fixing dual boot machine that won't boot Windows..: So I have a laptop with Windows 10 Pro. I wanted to dual boot and install Ubuntu on it. I shrunk the size of my partition and made a small one for Ubuntu. It now boots up automatically when I turn the computer on. If I go into boot options and select hard drive to boot...
  3. Time delay in dual boot system

    in Windows 10 Customization
    Time delay in dual boot system: I have a dual boot system with Windows 10 Pro and Ubuntu 18.04 LTS. Every time I switch to Ubuntu and get back to windows, I find time is delayed 2 hours! I am using a Dell laptop. What should I do to fix this?...
  4. How do I repair a dual boot system.

    in Windows 10 BSOD Crashes and Debugging
    How do I repair a dual boot system.: I have Windows 7 and 10 on a SSD PC (c:) but I keep getting a report that files are corrupt. My system boots fine but I no longer see the dual boot screen at startup. If I'm running MS Solitaire Collection card games my the games crash sometimes. I have the original Win 7...
  5. How To Fix No BCD File?

    in Windows 10 Support
    How To Fix No BCD File?: I have searched the forum and there's lots of hits. But very tedious going through them looking for the one that fits. If someone know which thread answers my problem then perhaps they could give me a link to it. This Win10 computer won't boot since a power outage last...
  6. Switch Operating Systems In Dual-Boot System

    in Windows 10 Installation and Upgrade
    Switch Operating Systems In Dual-Boot System: Dual-boot system Partition C:\ = Windows 10 Pro Partition E:\ = Windows 7 Pro Would it be possible to switch the OSs? I have applications to clone one partition to another but my concern are the already installed apps being functional. Did a Google search and all I found...
  7. Dual booting and system imaging

    in Windows 10 Installation and Upgrade
    Dual booting and system imaging: Hey. So i currently have Windows 10 pro on my wd blue nvme 256gb and i have 500gb ssd for storing my games. I will get a another 500gb ssd for other media like videos and photos. I would like to get into video editing and that leads me to "how to do this". I want to dual...
  8. Reinstalling Dual Boot System - Maybe

    in Windows 10 Installation and Upgrade
    Reinstalling Dual Boot System - Maybe: Since Windows 8.1 core OEM has the Sear.ch malware on it and I have a Windows 8.1 Pro key, I'm going to format the partition and reinstall. I have the flash drive ready with Windows 8.1 Pro on it. At the same time I'm going to format the partition and reinstall Windows 10...
  9. How to install on a dual boot system?

    in Windows 10 Installation and Upgrade
    How to install on a dual boot system?: I have two systems. System 1 is a desktop running W7 Premium SP1. I did clean install of W10 from iso on separate partition. W10 will not activate using W7 numbers. I suspect that is because I moved W7 to an SSD 6 mos. ago and W10 expects the old HDD. BTW, installed W10 to...
  10. Multi Boot system Easy BCD issue

    in Windows 10 Installation and Upgrade
    Multi Boot system Easy BCD issue: Ok so here's what has happened. I have a multi boot system. Windows 10 on my M2 hard drive. Then on another SSD I have Windows 10 Creators addition that I use to test updates . Then 1 more SSD that has Windows 7 and Windows 8.1. All were booting fine using Easy BCD until I...