[PaulMcDona]

Problem: The only issue is with Excel *.xlsx documents. A friend somehow managed to associate the .xlsx files with Word, so of course it obviously fails to open with Word. All other Excel files... templates, older *.xls files and such open fine by double-clicking on them.

Attempted fixes:
1)I have gone into and set *.xlsx documents to be associated with the Excel program, however the icon doesn't change to the normal Excel 2011 icon (the icon looks like a blank sheet w/ the normal Excel icon in the middle instead of off to the left side)
2)I have run the Office Repair to no avail
3)I have completely uninstalled, then reinstalled the entire Office suite too.
4)Finally, System Restore didn't work

What happens when I try to open an .xlsx doc? The hourglass comes up like it's thinking about it for maybe 2 seconds, then just goes away and nothing happens.

I wish I could say what happened or what changed to cause the problem, but my friend has no idea. By the way, I can open Excel, go to file--open-- and open an .xlsx document that way. Or just drag the file into the opened Excel program and it works fine.

After everything I've tried, I imagine there is just something registered incorrectly in the registry, but am unable to find out what exactly.

Thank you in advance for your time...

[GS[_2_]]

Make sure you terminate all existing running instances of Excel via
'Task Manager'. (via the Taskbar right-click menu)

Start Excel;
Open the Options dialog and choose the 'Advanced' tab;
Scroll down to the 'General' section and make sure the...

Ignore other applications...

...option is unchecked. (It's the 3rd option in 2010);
Open the file explorer app and choose an .xlsx file to open in the
usual fashion (double-click by default).

--
Garry

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[PeterLloy]

From the Start menu, choose All Programs (in Windows XP).
Select Microsoft Office.
Choose Microsoft Office Tools.
Select Microsoft Office Application Recovery.
In the resulting dialog box, shown in Figure C, choose Microsoft Office Excel.
Click Recover Application. The process could take a few minutes.
Respond to the Send Report To Microsoft prompt.

If doesn't help look for the answer he http://www.filerepairforum.com/forum...d-or-corrupted

Or:
XLSX Repair Kit. The latest corrupt XLSX file repair software featuring a powerful data recovery core and a convenient step-by-step wizard for extra convenience.
For more information: http://www.xlsx.repair/