Windows 8 does not work well with a lot of things, including other Windows applications. MEP 2013 is windows 8 compatible, so the code works with the OS. What specific problem are you having. If it is related to movie edit pro 2013 please be specific and ask the question here. If it about windows 8 or the metro startup abomination, that would be a question for Microsoft.
I foolishly purchased a computer with Windows 8 preloaded, and found that nothing worked properly for me because the metro startup interface kept sending me off into places I did not want to go nor did I expect to go there. My solution was to install one of the free Shell Applications that kills the metro startup interface and makes Windows 8 look and act like windows 7 while keeping some of the actual good parts of the W8 OS.