Excel File Format Troubleshooting Open

I encountered an error when trying to open an .xlsx file. It appears that the file format or file extension is not valid. I have tried opening the file on another computer and with another program, and it worked fine. I need an expert to diagnose and resolve the issue on my computer. Ideal Skills: - Proficiency in Microsoft Excel - Experience with file format troubleshooting - Good problem-solving skills - Ability to explain technical issues in simple terms.