At this stage it looks as though I will need to get Windows CDs as Olivier mentioned below. To fix this, use the following methods to troubleshoot this Windows Start error. Unfortunately fdisk will not set NTFS partitions as active, and I haven't found any alternatives that run from DOS and will set NTFS partitions as active. This error indicates that the boot sector is damaged or missing. Any glaring shortcuts, alternative solutions or likely obstacles I'm missing?Įdit: I now have a USB key, can boot to DOS and run fdisk, which I expected to enable the active partition to be set. How to Fix BOOTMGR is Missing Windows 7, 8 and 10 Solution 1: Restart Your Desktop or Laptop Solution 2: Repair MBR Solution 3: Remove All Removable Media. I think that the easiest solution will be to get hold of a USB key, make it bootable, and sort out the active partition from DOS. If you encounter BOOTMGR is missing in Windows 10 after cloning, you can try restarting your computer first. I do have an external HD, but this other computer that I'm on right now (which is unusably slow) doesn't recognise it. I am travelling and don't have a USB key or bootable CD with me. I can disable various SATA drives (four are listed) and doing that sequentially changes the error message on booting, but no combination lets it boot. I can go to BIOS and mess around with some stuff, but haven't found a way to change the active partition.
When attempting to boot, the laptop now returns "BOOTMGR is missing". I set C: as the "Active" directory in disk manager (I am using Windows 7). "Recovery" was previously the "Active" partition. I have a "Recovery" partition which I mistakenly thought was redundant after reinstalling everything to C. Often the ‘BOOTMGR is missing error’ appears when the system tries to boot from a non-bootable drive connected to the system.
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