FontFrenzy allows you to remove and backup all fonts that were not originally installed with Windows. Every time you boot your PC, Windows must load all installed fonts, which can slow down the boot if you have a lot of fonts installed. This program allows you to safely remove them, keeping a snapshot, so that they can be restored later if needed. In addition, it also offers management features to preview fonts, remove selected fonts and to install new ones. The program is free, however requires you to register (for free) after 30 days, if you decide to keep it.