Hello there, I'm having major issues i'd like to install windows 8, but when ever i try i keep getting an error which says something like "unable to install on to a mbr must be a gpt". I know many people have had this trouble but i only have one, 1tb HDD. So what i'm asking is it possible to convert without having to purchase another hard drive? I'm unable to convert it to a gpt under disk management but it was grayed out. Any help will be greatly appreciated.