Windows 10: How can I repair my Boot Sequence on a GPT Drive without changing to MBR?

After updating my GPU, which is the only major thing I recall doing, my PC doesn't recognize my boot drive anymore. After using a recovery drive, I attempted to used the Startup Recovery, but it automatically fails. My only option is to use Command Prompt, after fiddling around with bcdboot and BCD edit, I've had many errors along the way. FixBoot leads to element not found. RebuildBCD finds the Windows installation which is on E:, but then trying to add to boot list gives element not found.I ran: attrib BCD -s -h -r Ren BCD BCD.bakBCDboot E:\Windows /l en-us /s H: /f ALL Then BCDEdit accordi

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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.

 

changing a disk drive from mbr to gpt

If you have Windows 10 loaded on an MBR disk drive can that drive be changed to a GPT disk drive?

 

What is a better format for HDD over 2TB Master boot with Win 7 OS RAID... GPT vs MBR?

UEFI -> GPT
BIOS -> MBR

I use GPT whenever possible.

YES! BIOS can only boot MBR.