Excuse me, "PC" does not mean "Windows computer", so I'd pick a PC and install some Linux distro.
In the "I'm a Mac, I'm a PC" context there is no confusion what PC means. In Hacker News context I can understand how the term PC might be ambiguous. I am really arguing that at this point though even hackers are calling Windows machines PC's. Although I have always wondered why everyone refers to them as PC's I have never found myself being confused when I hear it nor have I ever been misunderstood when using the term.