1. From inside Windows Setup, press Shift+F10 to open a command prompt window.
2. Open the diskpart tool:
"diskpart"
3. Identify the drive to reformat:
"list disk"
4. Select the drive, and reformat it:
"select disk <disk number>"
"clean"
5. Reopen the command prompt (Shift+F10) and open the disk part tool again (step 2) and enter the following command
"select disk <disk number>"
"convert gpt"
"exit"
6. Close the command prompt window and refresh the disk list.
7. Continue the Windows Setup installation.
