im stuck on what to do. i have been without an os for 3 days now. i am currently using my playstation 3 which is no good i want my vista back. so when i go to install it gives me the error " windows cannot be installed to this disc. the selected disc is of the gpt partition style". i have followed some instructions to diskpart. but after ive seletced my disk and i press enter then type clean and press enter, i dont actually know if it has done anything or doing anything. i cant type anything else after that as it says to type exit in the instructions after typing clean, but it simply wont let my type it. so im hoping someone can shed some light on to this problem for me as ive been stuck for 3 days now and i really am at my last teather with this machine its about to be thrown out the window.