I wish my solution was as simple as just restarting. Here is what persists since upgrading to the free El Capitan
1 Hot Corners no longer works. For a temp work around I have set my F1 F2 F3 etc buttons to do what my hot corners used to do.
2 The custom buttons dont work on my mouse and my "Logitech Control Center" says "No Logitech Devices Found.
3 Scroll up and down is WAY to fast. I can't make it go any slower using the mouse settings.
4 Dock Magnification no longer work and I have double checked that the "Magnification Box" is checked.
Does anybody have any solution of work arounds I can try. This is very frustrating.
PS: I have multiple screen (6) and can't figure out any practical reasons to use "Split View" feature. Any suggestions?
Since this is an OS issue. I wonder if I can get some support from Apple Care. Wish me luck.