Before you uninstall - Read this. There is much more easy-to-read information at the source link. (FYI - to use Detect & Repair, you have to be in a Word document and click Help.)
"– Of course, there are rare occasions where none of these fixes actually fix your problem, so you may have to uninstall and reinstall Word. If you have Word 2000, 2002 or 2003, you can go to the Help menu and run Detect and Repair and this will fix many problems.
If you can't get into Word at all, you can go to your Windows Control Panel and double-click on Add/Remove Programs and double-click on Microsoft Office in this list and you will see an option to repair Office. Both of these require the Office CD to complete. However, if this still doesn't cure your problem or if you are using Word 97, which does not have Detect and Repair, you will have to uninstall and reinstall. Notice that I said to uninstall first because problems of this severity are rarely fixed by simply reinstalling the application over top of itself. And, another thing to know about Microsoft Office programs is that uninstalling them does not completely remove them from your system, so if the part of the program that was causing the problem has not been removed by uninstalling, it will still exist after reinstalling. To avoid this, Microsoft offers free downloadable Eraser Utilities to completely remove Office from your computer. I highly recommend you run the proper eraser after you uninstall and before you reinstall in order to guarantee a clean install. There are links to the Eraser utilities for both Office 97 and Office 2000 at my Office page: http://personal-computer-tutor.com/office.htm
– Source: http://www.personal-computer-tutor.com/NNTWord.htm
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Try this free scan:
http://www.fix-windows-errors.com/regcure/repairing_errors.php?m=28&gclid=CLqz8sennowCFSeMgAod9Fjczg