[SOLVED] Windows Won't Boot Anymore

[zorrodude]

So yesterday I decided to clone my OS from my 500 GB SSD to my NVME drive and factory reset my entire system to start fresh. I did all that, it took half a day as expected. After the factory reset, I started windows just fine. I then physically installed another SATA SSD to my setup and installed a new GPU. Again, started up my pc just fine. I installed all my programs and a couple games. I also partitioned / initialized my new SSD. After this I did an update for windows that required a restart. As soon as I did that, my pc now won't boot. I get the "boot configuration data is missing" with the error code 0xc00000f. I made sure in my bios that the NVME with Windows was the first drive to boot. I tried the whole USB Windows install to try to have Windows auto-repair, but that doesn't work. So I installed a 2nd Windows OS on the 500 GB SATA SSD just to get on my computer.

I think I've narrowed down the problem to 2, but I could be completely wrong since this is above my pc knowledge.
A) When I partitioned or setup my new SSD, I messed up something with that because I renamed some drives. Here's what my drives look like:

https://imgur.com/a/SObeB6J

View: https://imgur.com/a/SObeB6J

• Disk 0 is the 500 GB SATA SSD that I had to put the 2nd Windows on just to log on to my computer.
• Disk 3 is the NVME drive that has the Windows I want to use but won't boot up. Even after I set to boot first in my BIOS. It used to be my C drive by default, now it's not.

B) The Windows update I downloaded messed something up.

 

[SkyNetRising]

On Disk 0 windows is installed in UEFI mode.

On Disk 3 windows is installed in legacy mode. Active partition is set wrong. Set H: partition active.

If still can't boot from Disk 3, then execute from elevated command prompt:

bcdboot F:\windows /s H:​

​

How to Open the Command Prompt as Administrator in Windows 10

Much of the time, opening the Command Prompt as a regular user is all you need. Sometimes, though, you’ll need to open the Command Prompt as an administrator so that you can run commands that require administrative privileges.

www.howtogeek.com

 

[zorrodude]

On Disk 0 windows is installed in UEFI mode.

On Disk 3 windows is installed in legacy mode. Active partition is set wrong. Set H: partition active.

If still can't boot from Disk 3, then execute from elevated command prompt:

bcdboot F:\windows /s H:​

​

How to Open the Command Prompt as Administrator in Windows 10

Much of the time, opening the Command Prompt as a regular user is all you need. Sometimes, though, you’ll need to open the Command Prompt as an administrator so that you can run commands that require administrative privileges.

www.howtogeek.com

When I right click H drive, the "Mark Partition as Active" is grayed out?

Also I did the command prompt (not great with understanding command prompts) but now I have it when I restart my computer, I have to choose between Windows 10 on Volume 10 or Volume 3. Volume 10 brings be back to the original Windows, so there's progress!

 

[zorrodude]

After doing the command prompt now the drives look like this:

https://imgur.com/a/mb5S1Sr

View: https://imgur.com/a/mb5S1Sr


Basically the H partition is gone and NVME is back to C drive?

 

[SkyNetRising]

When I right click H drive, the "Mark Partition as Active" is grayed out?

You probably did right-click on a wrong partition. "Mark Partition as Active" can be grey only on a partition, that already is Active.

Also I did the command prompt (not great with understanding command prompts) but now I have it when I restart my computer, I have to choose between Windows 10 on Volume 10 or Volume 3. Volume 10 brings be back to the original Windows, so there's progress!

Probably syntax of bcdboot command used was different than suggested.
For example, if you executed

bcdboot F:\windows​

instead of

bcdboot F:\windows /s H:​