EASY!!! use the ‘DiskPart’ tool on the XP command line. Use ‘list disk’ to find the volume number of the GPT volume, then use ’select’ to choose itthen use the ‘clean’ function and then exit the tool You also can use ‘create partition’ command to create a new partition. Updates: Worked on Windows 8.1 & 10 but not tested… Read more →