From the 'Start' menu select 'Control Panel' and then select the 'Appearance and Themes' category.
Select 'Fonts' from the 'See Also' panel at the left of this screen.
On the 'File' menu, select 'Install New Font...'
Click the drive and folder that contain the fonts you want to add.
To select more than one font to add, press and hold down the CTRL key, click the fonts you want, then click on 'OK'.