I have a Lenovo laptop with Windows 7 Home Premium. I want to install Win 7 Professional or Ultimate on it. When I run the install program, I get to the screen that says, "Where do you want to install Windows?" The following partitions are listed: Disk 0, Partition 1 200 MB Type: System Disk 0, Partition 2 654.7 GB Type: Primary Disk 0, Partition 3 29.0 GB Type: Logical Disk 0, Partition 4 Lenovo_Part 14.7 GB Type: OEM (Reserved) Obviously Disk 0, Partition 2 is the one I should install to. 0,3 is probably system recovery. However, on any of these partitions, the install prog says, "Windows cannot be installed to Disk 0 Partition [whichever] (Show details). " When I click on show details, it says: "The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks." Anyone know what's going on? I also tried booting to a Linux-based Gparted partition utility and formatted the drive to NTFS. I still had the same results.