The 'X' in the upper right hand corner is suddenly dithered? Help

V

Vicki P

The 'X' to close the Excel app has suddenly dithered. If you right click on
it in the taskbar, the option to close is missing. I can click file-->exit
and that works. The 'X' to close the file is still available. I have Office
2003 and run on XP Professional. Thanks
 
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