Windows 10: Accidentally deleted boot partition when formatting disk to GPT. How do I restore it?

Hello,In the process of updating my Windows 10 PC to Windows 11, I unknowingly messed up my boot drive when formatting it to GPT. Now when I boot the PC I get a blinking cursor.I booted the PC using a USB with a Windows 10 installer. The repair diagnostics tool couldn't resolve the problem.Running DISKPART in command line, I could see the disks are still there and filled with data. I have 2 disks. One M.2 SSD which the system booted from originally and one HDD with my files. I would like to figure out if there's a way of restoring the boot in order to restore my PC.Thank YouEDIT: Attached are

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Convert only one partition on the disk from MBR to GPT

Follow the steps listed here on using GPTgen. He also lists how to create and restore backups.

Converting MBR to GPT without deleting your partitions

 

clone MBR HD to bootable GPT partition?

Hi,

1. You cannot convert mbr to gpt without data loss. otherwise, you can follow directions here:

FROM WINDOWS RECOVERY CONSOLE:

To change a master boot record disk into a GUID partition table disk using a command line

• 
  Back up or move the data on the basic master boot record (MBR) disk you want to convert into a GUID partition table (GPT) disk.
  
• 
  Open an elevated command prompt (right-click Command Prompt, and then click Run as Administrator) and type diskpart. If the disk does not contain any partitions or volumes, skip to step 6.
  
• 
  At the DISKPART prompt, type list disk. Make note of the disk number you want to convert.
  
• 
  At the DISKPART prompt, type select disk <disknumber>.
  
• 
  At the DISKPART prompt, type clean.
  

2. I'd suggest converting your vista drive to a virtual machine, load that up on your windows 10 system and use a program like virtualbox to run it.

 

Accidentally deleted GPT partition on hard drive

I have an SSD and a HD, I have windows installed on the SSD and I use the HD to store extra data. I accidentally deleted the GPT partition of my hard drive (doesn't affect my windows however windows can't detect the hard drive now) while trying to install Ubuntu on my HD for a dual boot. Is there any way that I can reinstate the GPT partition for the hard drive without having to pay for 3rd party software? Any help would greatly be appreciated as I am currently unable to access any data from my hard drive.