UEFI, Unable to Boot, Missing OS, Bootec in CMD, Statup Rep. Fail

ace12 · 10 Dec 2016

Hello everyone.

Please help me.

I have a very similar problem (almost identical minus UBuntu) as this thread:Repair Windows 7 boot menu on UEFI

I DO NOT have Ubuntu.

So in essence, my PC crashed after converting a video file with a slight overclock. When I rebooted it said: Operating system is missing...

It then changed to "select boot disk"

Used a windows recovery USB.

Made sure it was in fat 32 and GPT UEFI mode.

I have a Sabertooth R.2 990Fx motherboard, but I can't disable Secure Boot through BIOS. I am only given two options, "Windows in EUFI mode" or "Other OS"

Startup repair fails with root cause: No OS files found on disk.

I've tried using CMD and bootrec commands.

What I get when trying to set a partition as active:

The selected disks is not a fixed MBR disk. Active command can only be used on fixed MBR disks.

bootrec /fixboot
operation succesful

bootrec /fixmbr
operation succesful

bootsect /nt60 all /mbr
This tool can only be run on systems booted using a PC/AT BIOS. This system was booted using EFI or some other firmware type.

bootrec /rebuildbcd

Please wait..
Successfully scanned.
Total identified windows installations: 1
[1] C:\Windows
Add installation to boot list?
Yes

The requested system device cannot be identified due to multiple indistinguishable devices potentially matching the identification criteria.

I have no idea what to do next.

I would like to recover my DATA and get Windows back up and running.

ace12 · 10 Dec 2016

I just fixed my PC on my own.

I am not technically skilled, but it was a huge pain.

After Googling: "The requested system device cannot be identified due to multiple indistinguishable devices potentially matching the identification criteria." I found this thread:

Issue with a Windows 7 Boot issue - involving the BCD perhaps - Super User

Changed the id in CMD to what he wrote:

The string c12a7328-f81f-11d2-ba4b-00a0c93ec93b positively identifies an EFI system partition. When I wish to hide one from repair tools, I use select disk and select partition and then
set id=c12a7328-f81f-11d2-ba4b-00a0c93ec930 Notice that I've changed the ID just enough to make it different, while still obvious to a technician that this is an EFI system partition.

Typed in bootrec /rebuildbcd

Operation completed successfully.

Rebooted and to my surprise I got the login screen. I feel simply AMAZING now.

No degree or technical background, no programming knowledge... nothing, but thanks for everyone posting their problems online, related or unrelated!

So I now add my solution to the INTERNET!!!

Hope it helps