I have been using Excel 2010 for a year or so. Beginning yesterday, I cannot open Excel files unless Excel is already open. Several years ago, someone posted this problem and the response was:

"I would guess you have lost your 'file association'. Try right clicking on the file. Do you have the option to Open With... ? If so, click that and scroll to Excel. Check the box that says "Always use the selected program..."

When I try this solution, I get an error message saying that windows cannot find the file. Is there a different solution for the 2010 version?

Thanks for your help,
Tricia