Help with printing after upgrade


TS Rookie
My boss is being dragged kicking and screaming into the 21st century. My desk computer was just upgraded from Windows 7 to Windows 10 and now my printer, Brother MFC-5700DW is printing envelopes incorrectly. It correctly indents the delivery address but starts printing at the top of the envelope instead of in the middle of the envelope. Of course, we are using Word 2007 which is not supported anymore. Would this be a printer or software problem? Does anyone have an idea to fix it?