Stop Word from Automatically Inserting Hyperlinks
The Problem:
Every time I type anything that looks like a web address or email address, Word creates a hyperlink for me. I can get rid of the hyperlink with Undo, but how do I stop Word from doing this?
The Solution:
In Word 2003 or Word XP, if you can see a Smart Tag under the start of the hyperlink, click the Smart Tag and choose Stop Automatically Creating Hyperlinks from the pop-up menu.
If there's no Smart Tag, choose Tools 
AutoCorrect Options (in Word 2000, choose Tools AutoCorrect), click the AutoFormat As You Type tab, and uncheck the "Internet and network paths with hyperlinks" box.