If you use a localized version of Windows 10, the command will be different. There must also be an MSR ( Microsoft System Reserved) partition of 16 MB for Windows 10 (or 128 MB for Windows 8.1). The main partition with the installed Windows with the NTFS file system (it can be both Windows 10 and Windows 8.1) is volume 2. In this example, you can see that the EFI boot partition (it can be easily identified by the size of 100 MB, and the FAT32 file system, most often its label is System EFI) has the partition 2 index (aka Volume 5 with the Hidden label). Select the disk with Windows installed (if there is one hard disk in the system, its index should be 0):ĭisplay the list of partitions and volumes on the disk: Use another guide to restore the BCD bootloader on MBR (Master Boot Record) disk. On MBR disks, the Windows bootloader is stored on a separate System Reserved partition, not on an EFI partition (in any case, don’t convert the MBR partition table to GPT until you fix the Windows bootloader !!). Most likely you have a computer with BIOS or Legacy/Compatibility Support Mode (CSM) option enabled in the UEFI settings. If you have an MBR partition table on your disk, this instruction won’t work for your computer. If your disk uses a GPT partition table, follow the steps below in the instructions to repair the Windows EFI bootloader. After booting into the recovery environment, you need to open a command line: select System Restore – > Troubleshoot-> Command Prompt). To repair the bootloader configuration (BCD), you have to boot from the original installation Windows 10 media (or a recovery disk or a special UEFI bootable USB flash drive). Let’s move on to the procedure for manually restoring the EFI Windows bootloader on a computer with UEFI. Using BCDBoot to Manually Repair EFI Bootloader in Windows 10 But most likely the result will be negative: Automatic Repair couldn’t repair your PC.Then select Troubleshoot -> Startup Repair and select the OS whose bootloader you want to try to recover.On the installation screen, click the Restore System.Try to boot your device from the recovery disc or installation Windows 10 media.The procedure for the automatic repair of the bootloader used in the Windows Recovery Environment (WinRE), is usually useless in such cases. If the computer boots with a black screen with the message “Operating System not found”, most likely the Windows bootloader is completely removed. The bcdedit tool doesn’t see this EFI partition, and cannot manage the bootloader configuration on it. The fact is that if Windows 10 is installed in native UEFI mode on a GPT disk, then the Windows 10 EFI bootloader ( Windows Boot Manager) stores the boot manager and BCD configuration on a separate hidden EFI volume (100 MB in size with the FAT32 file system).
The requested system device cannot be found. If you try to repair the bootloader on a UEFI computer using the bcdedit tool, you will receive an error like this: The boot configuration data store could not be found. This error indicates that the Windows bootloader configuration – Boot Configuration Data (BCD) has been corrupted or even completely removed.
#Bitlocker repair tool for windows 10 boot Pc
When trying to boot the computer, the following BSOD (Blue Screen of Death) error appears: The boot configuration data for your PC is missing or contains errors. The boot configuration data for your PC is missing: EFI\Microsoft\Boot\BCDĪ computer with Windows 10 installed in native UEFI mode will fail to boot if the EFI bootloader is corrupted.
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