I have a problem with one of my excel files which I use a lot.
I often need to copy and paste cells from the excel into my browser.
Usually, when I copy, and then try to paste, it doesn't work.
When this happens, my CPU rises dramatically and the excel file doesn't respond for 15-30 seconds.
This is driving me crazy.
I tried using all methods of copying (CTRL+C, menu, mouse) - all with the same result.

The file itself is not that big (about 2.5 MB), it has 10 spreadsheets, 400 rows in each, and about 15 columns. My computer is very strong, so it isn't the problem.

Has anyone come across something like this?