The XP/7 hard will forever stay that way. XP has Office 2003, 7 has Office 2010, both of which run way better than 2013 and 2016 ever will.
I have software freezing W10 at that version and it go no further, until, of course, MicroThief gets around my defenses and updates against my wishes.
I'm content.
I have office 2003 on Win7 a nice stable couple.