The selected disk is of the GPT partition style

Source

Formating the primary drive GPT from the get go or starting with a blank partition leaving Windows 7 Pro & Ultimate to do it via diskpart, setup will not proceed until you change the partition scheme to NTFS or MBR. Continue installation / setup remains greyed out even though you can clearly see the partition formated GPT and you receive the following message...

Windows cannot be installed to Disk 0 Partition 1

Click on "show details"

"Windows cannot be installed to this disk. The selected disk is of the GPT partition style."

Are you using an EFI supported Motherboard running the port controller in AHCI mode?

no, EFI has not entered the PC business laptop and desktop world yet. It is limited to mostly blade and enterprise servers.

Intel and MSI both offer EFI support desktop motherboards, I am running the Intel DP55KG motherboard, this is also the only system that I have been able to install OS on GPT