This is so frustrating. I worked on this computer a year ago but it doesn't work now. and No, going into the fonts panel in control panel and installing them that way doesn't work either. Does anyone have a way to fix this? I appreciate any help.

Unfortunately you're not giving us a lot of information here. What fonts are concerned? Is there an error message?

all of the fonts on this site. OTF files. in this case the error says "Cannot install Christmas Cookies.otf The file 'C:\Windows\Fonts\Christmas Cookies.otf' does not appear to be a valid font."
But it does this with all of the fonts from this site for some reason.