Windows 10: Disk partition unknown, not initialized, can't mbr or gpt

Two days ago I was cleaning out my PC because it was in dire need of dusting and cleaning, as well as taking out 3 noisy fans and replacing them. After spending 11 hours on trying to get the fans to work, problem #2 was trying to get the monitor to display anything. So overnight, and most of Wednesday, after fixing that, it went to another and still ongoing problem, my SSD not recognizable in BIOS or Windows!After spending all day trying to no avail, I just decided to buy a new SSD of the same one and installed a fresh Windows. I also bought a M.2 NVMe to USB/USB-C adapter for my old SSD becau

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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.

 

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

 

Convert only one partition on the disk from MBR to GPT

Hi,

Yes

Without deleting all partitions you can achieve this. Just use a disk converter named an AOMEI Partition Assistant Professional Edition.

Convert MBR Partition Table to GPT without Data Loss

Step 3:
in this document

AOMEI Partition Assistant Lite Edition.
It’s a free multifunction partition management software. This tool’s feature can help you convert a disk with data into GPT or MBR style without data loss.