A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi Karthikeyan.1995,
Right click an xls file, choose 'Open With' - Choose Another App
Check the box marked 'Always use this app to open xxx . . .'
If Excel is not in the list, scroll to the bottom and click 'More Apps'
Again if Excel is not in the list, at the bottom, click 'Look for another app on this PC', then navigate to find he Excel application in C:\Program Files (x86)\Mocrisoft Office\