problem word icons

hi

i reinstalled Windows 10 and office 2016 pro with legal licenses,and other several aplications.
some doc files i have on a folder,instead of appear the w of the office ,it appears like a shortcut, other docs on other disks are ok.I already do open with word and does always that i see on Windows already and its ok.
If i press f5 it appears the correct icon and comes again the shortcut icon, but the files open ok with office.
if i create a new one he creates with icon ok.
i ask if its a problem with Windows 10 ?

how do i do that