Excel for Windows is crashing

1. Reboot Your Computer

Whenever Excel starts acting strange, the first thing to do is to reboot your computer. 

2. Excel for Windows: Remove Temporary Files 

If Excel keeps crashing, next remove the temporary files from your computer, as when they accumulate they can cause Excel to crash unexpectedly.

3. Repair Your Workbook

The next thing to try is to repair your workbook. You'll want to close it and then reopen it in this fashion:

4. Make Sure to Use Microsoft 365 (formerly Office 365)

You're entitled to a free copy as part of your university enrollment, which you can access at www.microsoft365.com and then log in with your university email and password.