i had to google this same problem.
If you go into your windows font folder, and then right click, at the bottom of the drop-down list is “install a new font” selct this and at the bottom navigate to the folder that has the new font(s) in it, (MAKE SURE YOU COPY THE FONTS TO A FOLDER ON YOUR C: DRIVE or whatever drive you have windows installed on first) and then select the font and press install. To copy all of your fonts press selct all, and then install, though this takes a while because you have to decide wether or not to replace the fonts that already exist but you can obviously just press and hold “n” so that it automatically doesn’t replace them. You will need administrator privilages to do this.
(copied and pasted so spelling errors arent from me)