I have a drawing that I made last year using 2016SP4.
After doing a pack&go so as to re-use the model and drawing for a different project I ran into this
I'm pretty certain that I didn't use any custom font because I never use custom fonts and seeing as that it was something that was originally designed from scratch there really shouldn't be any non standard font in it to begin with. And no, there were no fonts add nor removed on a Windows level either.
Anyone else ever ran into this or having a suggestion what font "?????" is ?