A warm welcome to Mac-Forums, shrimp638 and thank you for posting.
Before anyone can offer constructive assistance, we do need to know a bit more about your setup.
For example: What Mac? Model, year. Which Operating System is it running?
Presumably, as it is an Excel File, you are using Boot Camp? Or is it one of the virtual software products like Parallels?
Where did the Excel file come from? By that, did you generate it or import it? If imported, from where - Mail, another Mac, a PC etc?
Sorry to burden you with all these questions, but the answers will help us to help you.
Ian