How can I run only Windows on my Mac?

Episode 1111 (1:12:16)

Karen from Charlottesville, VA
Apple MacBook

Karen has a MacBook which she runs Windows on, but she then deleted the OS X partition to run it solely on Windows. Leo says it's a legitimate use for a Mac if she prefers Windows because it's essentially a high end Windows PC, at least according to Walt Mossberg. Leo says that there is a Windows version of startup tools for Apple that she can get, which will boot up straight into Windows.