Excel- .xlsx are not being associated

December 2016


I have installed Microsoft Office Pro 2010 (32 bits) on Windows 7 Pro 64 bits . Everything works fine except that Windows won't associate *. xlsx files to Excel, while all other XML files are being associated to the right program. What can be done?


Click Start > Run > type "regedi" and press Enter.
Expand the following keys:

For each of these keys there is a string value named "doc_auto_file" or "xlsx_auto_file" ....
  • For the first entry put: "Word.Document.8"
  • For the second entry put "Excel.Sheet.12"
  • Close the registry and restart your PC.

Thanks to leper21 for this tip.

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