How to recover my excel files?

@ Kingmichael; my immediate reaction was to wish you had provided more information: are you getting an error message, what versions of Excel and Windows are you running, etc. From what you’ve provided, though, it seems that the problem is that Excel would not open, not that your files are corrupt and need recovery.

I did a little research and found that there is a repair option for MS Office. Go to Add/Remove programs, find the Microsoft Office entry, and then you should find a ‘repair’ option on the dialog that appears.

If that doesn’t work, here’s an article that lists 5 different ways that you might try:
http://cnedelcu.blogspot.com/2013/09/top-5-fixes-for-excel-2013-has-stopped-working-word-powerpoint-outlook.html

Here’s a link to another article that lists possible Excel repair interventions by version:
https://www.add-ins.com/how_to_repair_office.htm

If your problem still persists, try including more information about the issue in this comments section, and hopefully someone can help.

Excel file can be repaired manually if it is less corrupted but Open and Repair program doesn’t work if highly damaged due to corruptions. I searched for solutions to repair corrupt Excel file and found one solution which is full of information and provides a guaranteed solution. I am sharing this solution with all the users -Excel Repair Toolbox. Follow the exact steps given in this programm and you will be able to access the data.
https://www.repairtoolbox.com/excelrepair.html