Did you try the alternate methods?
- Open the font file (by double clicking on it), on the left top corner you can find Install button, click on it. Click Yes, if UAC prompts. This should install the font.
- Copy the font and paste the font inside C:\Windows\Fonts. This is like installing the font. as method 1.
,
clicking Control Panel, clicking Appearance
and Personalization, and then clicking Fonts.