Unfortunately a lot of companies are still stuck with Windows servers. Nobody ever got fired for choosing Microsoft, right. As a developer this can be furstrating because choosing a server technology is usually limited to ASP.Net. I have experimented with hosting Node.js applications on a Windows server by using iisnode. But it is a pain to get up and running, setting the correct permissions is a time consuming chore. Microsoft has taken control of the development of the project but I get the feeling it's not very active any more. There are several Stackoverflow questions where people just give up configuring it.