Audition is . . . slow

9 times out of 10 these days when I turn my computer on (Windows 10) and start Audition, it is very slow to perform several tasks, notably opening and closing files, cutting, copying, normalizing, and running effects racks. I can't seem to figure out why or how to get it running properly - it usually goes back to "normal" at some point, but often it takes a while (sometimes as much as a day or more). I've tried everything I can think of: closing and reopening the program, uninstalling & reinstalling it, putting the computer to sleep and then waking it up, restarting, not having any other apps or anything else open, etc. - but nothing seems to fix it. I don't think it's an issue with my computer because everything else works just fine - in fact in preparation for this post I tried it on another computer (my laptop, also Windows 10) with the same result: Audition performs abnormally slowly but everything else works just fine. As someone who spends several hours a day working with Audition this is pretty frustrating because it is costing me lots of time, so if anybody can point me to a solution, I'd be very grateful.

Thanks,

Brian