While successfully dealing with another issue on my machine this morning, I was reminded Microsoft will terminate support for Windows XP, no matter the service pack, in April 2014. The Microsoft site is recommending upgrading to Windows 8.1. I've attempted to search this forum for advice, however, after two inputs of keywords I only came up with about 500 entries each time. So to simplify matters - based on the totality of experience of those who frequent the forum, and use Windows 8.1 with FS9, will there be any issues or headaches with the sim following changeover of operating systems from Windows XP SP3 to Windows 8.1? Thanks!