Is Word 2007 acting as though you have accidentally hit the Insert key on your keyboard? You hit Insert again, but the text you type still overwrites instead of inserts text.

There is an option in Word 2007 called Overtype Mode that may be causing this problem. You can enable or disable this feature by performing the following steps:

1. In Word 2007, click the Microsoft Office Button, and then click Word Options.

2. Click Advanced.

3. Under Editing options, uncheck the Use overtype mode check box.