When you were playing the game by the rules instead of bending the rules you would never have had to ask this question.
So for once and for all for those who are convinced that they know better, you don't. You just told yourself that you know better.
Anyway, this is how it is done: Go to the barn and get yourself a sledge hammer. Back at your PC hit the Windows Start key with the sledgehammer. Now go to the optician and get yourself some reading glasses. Back home use those reading glasses to find the phrase Help and Support in the start menu. Use the sledgehammer to hit that phrase. The help page will open. Type fonts in the search box. On the following page hit Installing a font.

This was the easy bit. Now things become complicated. You must now follow the instructions. That is difficult because you know better but you'll have to. Live sucks, alas. But it also gas a good side. Once followed the instructions to the letter you will have installed multiple fonts in only one go. Not easy and and very frustrating as you couldn't do it your way but you did it. Bravo!