Windows 10: How can I rebuild SYSTEM Partition and convert from MBR to GPT before upgrading to Windows 11

I have spent a week trying to get my to where I could upgrade to Windows 11.I had crreated my windows 10 page file on a separate disk to avoid paging writes to my SSD drive. In doing so, I lost the drive where the page file was located. As it turned out, the SYSTEM partition was also on a separate drive from my windows C: drive. I never knew that the SYSTEM partition could be on another drive. I back up my PC every week but never backed up the other drive where the SYSTEM was actually located. I have been unable boot my system because the SYSTEM partition is gone. I installed a disk from an

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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.

 

convert mbr partition to gpt

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During installing windows" select window has MBR partition windows can only install in gpt disk" this error come . Then i formate all the disk partition. Still this error will occur. Then i start converting mbr to gpt . But my
other drives are not seen . only System reserved and usb drive is seen . Other four drives are not seen