Replacing the CEO of Microsoft isn't going to be an easy task by any means . The candidate list will grow long and tiresome before the process is completed, but there are a few early on favorites that might take the inside track. "I don't think Microsoft will fill the CEO spot from within," said Patrick Moorhead of Moor Insights and Strategy. "They need to show that they are thinking differently, and to fulfill those optics, they will go outside. If not, it could be portrayed as the 'same old – same old'."