How to check for COM Add-ins in Excel and disable those you don’t need.

To get access to the COM Add-ins list:

1. From Excel’s menu, choose Tools | Customize
2. Then select the Commands tab, and choose Tools from the Category list.
3. Scroll down the Commands list until you see "COM Add-ins...".
4. Click and drag it to the Tools menu and drop it under the existing Add-Ins… menu entry.
5. Close the Customize dialog.

Then, to check the COM Add-Ins loaded:

1. Select you new COM Add-ins... menu item you added above.
2. Review the various add-ins that are listed

If you’re seeing a prompt like this when you exit excel,

then consider turning off the Google desktop add-in, which may fix the problem.