A good source is
Http://www.dafont.com/
Next, install the font on your harddrive.
Then follow these steps -
Click Start, Settings, Control Panel.
Open the Fonts icon by double clicking the icon.
Within the Fonts window you will be able to view each of the currently installed fonts as well as install new fonts. To install a font, click the File menu and select Install New Font.
Locate the directory of the fonts you wish to install.
Highlight the fonts you wish to install and click ok.