Excel: Excel workbook suddenly causing Excel to freeze up

Thank you for your time. I have an excel workbook that I use every month for inventory. Suddenly, this month, it reacts very slowly to my mouse clicks and is causing me to have to close it out and re-open it. It has around 50 tabs on it. Some have a good deal of data, but most do not. There's a couple of tabs that seem to be the biggest problem. I'm trying to copy one particular tab to a new workbook, and every time I try it, it just spins and spins and I have to end up closing excel and recovering my work. Is there a way to find out why this workbook suddenly acts so strange? Most of it is just data. There are a few formulas in each tab, but not too many. And like I said, it has worked just fine in the past. Thank you.

This question generated 12 answers. To proceed to the answers, click here.

This thread is current as of June 02, 2017.

For more resources for Microsoft Excel