How do you FULLY Uninstall Word + Serial?

[pork917]

Long story short, a friend installed the package containing Word on my gf's brand new Macbook, but it was obviously a pirated version with a bad serial so now everytime she is online and using Word it closes and tells her so. I bought her a legitimate copy of Word from Apple but when i try to install it, it continues to use the old pirated serial and doesnt even give me the option to put the new one in. So how can i fully wipe out the old word and its serial out of the system? I am sort of a mac noob, so i REALLY appreciate the help. Thanks

 

[wrldwzrd89]

Please direct discussion on this to the other thread.