I've had this problem a few times but it usually straightens out after a week or two but not this time. Running Windows 10 and when it does an update my Cb runs really slow. This time it hasn't come back like it normally did. I read somewhere that it might have updated to graphics drivers on computer and they aren't compatible now but I checked and the drivers on mine are from 2015. Any other ideas?
[Note: I moved away from Windows some years ago and now my systems are mostly Linux Ubuntu. So my Windows experience is outdated.]
One thing that comes to mind is that based on your description above is that Update may have resulted in a bunch of temporary files that clog up your drive and slow the system down. Deleting temporary files may help. Some reading on this issue:
If deleting temporary files helps, that suggests that you may have limited disk space available. In that case if you have programs and or data that you can move elsewhere to free up more disk space, that would be a good idea.