Today, my word 2007 doesn’t work suddenly. I would get a “An unknown error occurred” message with title “Endnote X2” (shown below) when I tried to open or edit any word files.
Endnote X2 unknown error
This drove me crazy, I uninstalled and reinstalled word 2007 several times, still nothing new happened. Finally, I got the answer. Here’s solution from Microsoft Help and Support website.
Original website link: http://support.microsoft.com/kb/921541
Delete the Word Data registry key
Most of the frequently used options in Word are stored in the Word Data registry key. A common troubleshooting step is to delete the Word Data registry key. The next time that you start Word, Word rebuilds the Word Data registry key by using the default settings.
To view these options in Word 2002 or Word 2003, click Options on the Tools menu.
To view these options in Word 2007, click the Microsoft Office Button, and then click Word Options.
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