off topic, but does HA ring any bells???
Ok your question...
I assume you have MS Excel installed but the file just isn't opening?
Try opening Excel and then opening the spreadsheet from the Openfile Dialog within Excel.
If that doesn't work, then there was probably an error copying the file over, in other words, the file may be corrupt.
If however, you don't have Excel installed, then i'm afraid you can't open the spreadsheet.
Hope this helps.