When any .xlsx file is launced{dbl-clicked} (from the desktop or from Windows
explorer) Excel opens up as a blank application (toolbars only). If you then
click on the Office buttton by itself the files open. I do not have to click
on Office buttonopenand select the file name.

I have tried this as a potential solution...
In Microsoft Office Excel 2007, click the Microsoft Office Button, and then
click Excel Options. Click Advanced, and then click to clear the Ignore
other applications check box in the General area. Click OK.

Now the files won't open at all. Has anyone seen this? Thanks much!