Patrice,
Look in the Control Panel (from the start menu)
If you have a "Fax" entry - then it is installed.
If this is not the case, go to "Add or Remove Programs" from the Control
Panel, then Add/Remove Windows Components.
Fax services is generally right below Accessories.
(THIS REQUIRES YOU TO HAVE AN ANALOG 56K DIAL UP MODEM INSTALLED ON YOUR
MACHINE, DSL AND CABLE MODEMS ARE NOT SUFFICIENT)