My roommate just had this problem with Microsoft Word 2003, and I found the fix using the Google search engine. Here’s what you do:
Tools -> Options -> Edit
Check “Typing Replaces Selection”
That’s all my roommate had to do. For the sake of completeness, the fix also says:
Tools -> Options -> General
Uncheck both options that have WordPerfect in them
Hope this helps someone.



Thank you so much, was bugging me for a while!
Thanks, I thought I was doomed to pressing “Delete” instead of backspace forever.
Thank you so much
I don’t even know how did I uncheck the option but now I’m fine thanks to you
Thanks very much… it was very very helpful… anyway… how did we un-check the settings in the first place.
You rule! Your’s is the first to pop up on google! Thanks for posting this!