I have serious troubble and need som expert help... I am going to install W8 enterprice 64 bit on my dell Latitude E6220 laptop and my HP Pavilion. First: the iso I have downloaded and burned to dvd is the iso from The Official Windows 8 Repository. And I have a legitime key to use. But, when i boot up my new w8 enterprice 64 bit dvd i come to the install screen. When i put the marker over my partision 1 (whitch is my windows partition) At this time im ready to format the partition. I get the following message: Windows cannot be installed to this disk. The selected disk has an MBR partision table. On EFI system windows can only be installed to GPT disks. This happens both on my dell laptop and also on my hp desktop. Same issu. I cant understand.. I have done this MANY times before on window 7. Whats happening on W8??