Like in my case - Windows installer assumed WITHOUT EVER ASKING ME that it’s OK to install Windows on one disk and install boot files on another. So - it DOES NOT do the right thing sometimes. You Windows folks rely heavily on the system doing the right thing? That is often seen in the way Windows tips ans manuals are written… Well you may have noticed that if it did so we would NOT need any tutorials like this one at all, would we. In case you’re not RESTORING but making another disc bootable, you’ll need to copy ‘bootmgr’ to the root of your target disc to boot. With all these excellent things there is one not mentioned here but may also be important. Now you can restart your computer and make sure that Windows 10 boots as usual. So we have re-created Windows 10 bootloader and BCD file, and fixed the boot sector on MBR. Select it: select volume 1Īssign a drive letter (I assigned a letter C:, but you can use any other letter, in this case change the path in the following commands): assign letter C:Ĭreate an entry for the Boot Manager (bootmgr):īcdedit.exe /store c:ootcd.tmp /create /addlast The screenshot above shows that the System Reserved partition is called Volume 1. Select your local disk (in my case, only one hard disk is installed on the computer, but you can list local disks with the list disk command): select disk 0

If the drive letter is not assigned to the System Reserved partition (by default), you can assign it yourself using diskpart. This partition contains installed Windows, programs and user data. NTFS partition with the size of 39 GB and the letter D: assigned.By default, BCD file is located in this little service partition ( read more) System Reserved partition with the size of 500 MB and the drive letter C: assigned to it.In our case, there is one hard drive on the computer with the two volumes on them: You will see the list of partitions, the drive letters assigned to them and their sizes. Next, you need to identify the local drives and volumes on your computer (most likely the volume letters assigned to them will be different from those you see when working in Windows). If there is no asterisk in the GPT column, then you have the MBR partition table on the disk, and you can continue to follow this instruction. If the disk has an asterisk ( *) in the Gpt column, then the GPT partition table is used on this disk (this means that you have a computer with UEFI and you need to use the article from the link above to restore the Windows bootloader).

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