Tools menu > AutoCorrect Options > AutoFormat as You Type Tab:
Uncheck the box for "Internet and Network Paths With Hyperlinks"
Also, whenever Microsoft Office does something to you (like changing your
numbering style in Word when you want to type your own number), you can
always go the Edit menu and choose Undo to undo it immediately, but it
won't change the intrusive behavior for the future. For that, you need
the AutoCorrect Options as described above.
--David
--
David M. Marcovitz
Director of Graduate Programs in Educational Technology
Loyola College in Maryland
Author of _Powerful PowerPoint for Educators_
http://www.loyola.edu/education/PowerfulPowerPoint/