To change a master boot record disk into a GUID partition table disk using the Windows interface and Commend interface

Method 1

1. 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.
2. If the disk contains any partitions or volumes, right-click any volumes on the disk and then click Delete Partition or Delete Volume.
3. Right-click the MBR disk that you want to change into a GPT disk, and then click Convert to GPT Disk.

   Method 2

   1. 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.
   2. 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.
   3. At the DISKPART prompt, type list disk. Make note of the disk number you want to convert.
   4. At the DISKPART prompt, type select disk <disknumber>.
   5. At the DISKPART prompt, type clean.
      6.  At the DISKPART prompt, type convert gpt.