PC
you can run a search from your start button. try searching
for "winword" and "word." when the finder lists the files
containing the search words single click on the program and
below will be a box which shows you the location.
at the same time, there should be an icon from your start
button, just look through everything
MAC
hold down the button with the apple (called "open apple")
and hit the letter "F," a search dialogue box will come up,
enter "word" and begin search. when all of the found items
are shown, single click and a drop down list will show up
with the path to the program.