Any solution yet? I tried to copy the Fonts folder inside the Windows folder to a new folder using the CMD commands and all my old fonts (back when I was using Win7) showed up, there are around 350 of which Windows 10 only displays 80 in all my programs. Then I tried to copy the 350 fonts of this new folder to the Fonts folder inside Windows folder and this did nothing, everything seems to be the same. I had noticed that this only happens with fonts I had installed before upgrading to Windows 10 since the new fonts I download installs without any problem. Do you think if it's a good idea to delete Fonts folder inside Windows folder and then copy the folder with all the fonts I made before in Windows folder? Or it will crash my PC?
PS. Strangely enough, Settings app does show all the fonts... and I managed to reinstall some fonts by uninstalling them as you said before, but some fonts I had before came atomatically within Office and Adobe installations... Maybe it's time to go back to Win7...