El Capitan Mouse/Keyboard Issue

[willgoff]

Hi,

I am using a MacBook Air (13 inch, Early 2014) model.
1.4 GHz Intel Core i5, 4GB 1600 MHz DDR3 RAM, Intel HD Graphics 5000 1536mb, 250gb SSD.

I noticed when I upgraded to El Capitan there is some small but noticeable lag with both my keyboard and mice when trying to log in - I only noticed because the keyboard lag forced me to retype my password very slowly before it would work.

I notice in certain apps they keyboard and mice work as normal such as Safari but always on the log on screen, desktop and when changing system preferences.

I have deleted a Bootcamp partition and done a fresh install of the OS but still the same problem persists.

Any ideas?

Thanks