Problems with trackpad - Macbook pro
Hello,
I am having problems with my macbook pro trackpad. When I try to move the pointer around the screen with it, it lags or doesn't move very well. I've been using an external mouse and it works ok. Anyway I eventually brought the macbook in for service thinking i needed a new trackpad but I realized when I was showing the technician that the trackpad works perfect when I am on the login screen. It is only once I login under my name does the trackpad start to malfunction. Anyone have any idea what is going on?
MacBook Pro, OS X Yosemite (10.10.4)