For the users that do not work , check this setting
http://support.microsoft.com/kb/211494
Excel opens with an error or without displaying a workbook
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This article was previously published under Q211494
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SYMPTOMS
When you double-click a Microsoft Excel workbook (.xls file or .xlsx file) in Microsoft Windows Explorer, Excel does not open the file, and you may receive one of the following error messages:
Cannot find the file ‘path’ (or one of its components). Make sure the path and filename are correct and that all required libraries are available.
There was a problem sending the command to the program.
In Window Vista, when you double-click an Excel workbook, Excel does not open the file, and you may receive the following error message:
Windows cannot find ‘FilePath\FileName’, Make sure you typed the name correctly, and then try again.
Excel may actually open, but the file will not open. If Excel is already running, a second instance of Excel may start.
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CAUSE
This problem may occur if the Ignore other applications setting in Excel is selected.
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RESOLUTION
To have us fix this problem for you in Excel 2010, Excel 2007 and Excel 2003, go to the “Fix it for me” section. If you would rather fix it yourself or you have a version Excel prior to 2003, go to the “Let me fix it myself” section.
Fix it for me
To fix this problem automatically on Excel 2010, Excel 2007 or Excel 2003, click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard.
Fix this problem
Microsoft Fix it 50392
Note This wizard may be in English only; however, the automatic fix also works for other language versions of Windows.
Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.
Let me fix it myself
To resolve this problem yourself, follow the steps for your version of Microsoft Excel:
Microsoft Excel 2010
1. Click the File tab, and then click Options.
2. Click Advanced, and then click to clear the Ignore other applications check box in the General area.
3. Click OK.
Microsoft Office Excel 2007
1. Click the Microsoft Office Button, and then click Excel Options.
2. Click Advanced, and then click to clear the Ignore other applications check box in the General area.
3. Click OK.
Microsoft Office Excel 2003 or earlier versions of Excel
1. Click Options, on the Tools menu.
2. Click the General tab.
3. Click to clear the Ignore other applications check box, and then click OK.
After you do this, you should be able to open workbooks by double-clicking them in Windows