I'm using Windows 10 x64 Pro and I'm unable to preview or install fonts.

When I try to preview a font (double click or Right Click >> Preview ), I get an error message that reads "The requested file <font file> is not a valid font file" as shown in the screenshot below:

When I try to install a font ( Right Click >> Install ), another error that reads "The file <font file> does not appear to be a valid font" is shown (screenshot below):

Things I've checked:

I have UAC enabled in my registry but set to lowest setting "Never Notify". I thought UAC had something to do with this, but the behavior is the same whether or not EnableLUA is set to 0 or 1 in registry.

is set to 0 or 1 in registry. I have checked the Event Viewer (Application and System sections) for hints to the problem, but this error is not reported at all in the logs from what I see. This seems strange.

Why can't I install fonts on Windows 10? I verified the behavior with several downloaded otf and ttf font files. So I'm fairly certain the files are not corrupted.

EDIT

When I go to the Fonts section of Control Panel, I do not see an "Install Font" option in the "File" menu, as shown in the screenshot below.