I'm trying to install 64-bit Java on Windows 8.1 and I'm getting a strange error, "This app can't run on your PC". From what I've seen, this is supposed to show up if you're trying to install a 64-bit app on 32-bit windows. The strange thing is that I am running 64-bit Windows. The System window says, "64-bit operating system, x64-based processor". I've run the compatibility checker and that doesn't seem to help either.