Unable to install fonts on Windows 10

Solution 1:

After a week of trying everything. The answer as weird as it sounds is to enable the windows firewall. I know, makes no sense right? It's not connected to font settings, however once "On" I was able to fix my issue with installing fonts on windows 10 and without an error message!

Solution 2:

I met this problem as well through my git repositories hosting font files. Here's a weird solution that worked for me. Copy (and yes its Ctrl + C not Ctrl + X for cutting) the file somewhere else or even in the same directory and the copied file will work.

Also the top solution does not work for me. My firewall is already activated.

Further digging showed that copying did not change any of the file contents. Both are the same, I ran sha1sum on both files, and their hashes matched.

Later checking the security properties on the original font file, Windows popped up with "The permissions on X.ttf are incorrectly ordered, which may cause some entries to be ineffective.". So it looks like my git cloning of the repository is causing some messed up permissions to be set upon placing the font file in Windows. In that case, it does have some relation to the security and permissions system on Windows. That just means the error that font viewer application is giving back is very badly worded.