I have a 2013 MBP and mu wife a cheap 14" Dell bought around the same time. Fun fact: using my Samsung TV as a second display didn't work in MBP running Mavericks and worked in the Dell running Win 7. After I upgraded to Yosemite/Win10 things got inverted and now I have to stop coding in order my wife can watch Netflix in the TV with her girlfriends...

Bottom line: windows has crappy driver support for old hardware