Earlier today I changed the size of my bootcamp partition because I completely ran out of room. Well, I only made it about a gig or two larger and somehow it got filled again without installing anything. (I have all of my downloads and installs on my external hard drive.) Now when I go to change the size again I get the message, "You can't resize the partitions on this disk because it uses the Master Boot Record partition scheme." Is there anything I can do to fix this? I really don't want to re-install Windows all over again and install all of my Steam games again... Thanks for any help.