So I have downloaded fonts to a separate folder on my PC, and I unzipped it, and clicked copy and went to the "FOnt" folder under Windows to paste it, and I keep having this message saying :

The xyz font is currently being used and cannot be replaced.
Wait until Windows is finished using the file, and then try again

So what should I do ?
or is there another way to use a font without downloadind it to the windows/font folder...

Pleaaaaaaaaaaaaaaaaaaaaaaaaase helpppppppppppppppppppp