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Excel Document - incorrect extension

Last Modified: 2015-07-04
Hi Experts,

I have 2 PC's, both running office 2003. both have the 2007 compatibility pack installed. both are identical in setup.

1 PC wont open .xlsx files, I know that the file extension is suppose to point at Microsoft Open XML converter but I don't know where I am browsing to find it.

for example excel is located in : C:\Program Files (x86)\Microsoft Office
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