To remove COM Add-ins: In Excel 2007-2021 do Office Button or File Tab, Options, Add-ins, change "Manage Excel Add-ins" to "Manage COM Add-ins" and then click the GO button.With COM add-ins, Excel and the COM add-ins seem to fight over memory. Three or more? That's like jumping out of a plane without a parachute. If you have two running, consider that you are walking on thin ice. The following are the steps we recommend you do, in order of ease of doing: And see out comment at the bottom for when we were not successful on our own PC We do the following steps frequently with great success. Sometimes we calls saying Excel is running slower than a turtle (no offense turtles). We often get support calls where the user says Microsoft Excel has just crashed for the Nth time, or all of sudden has locked up. If you are getting Microsoft Excel crashes, locks up, or Excel is running extremely slow, we have several suggestions that have a very good chance of fixing
How to Stop Microsoft Excel From Crashing