I'm thoroughly stumped. I would really appreciate any input you all can give me. For some time now, every time I start up my laptop it appears to be installing something. I get the gray bar that moves from left to right which only used to happen when I was upgrading my OS. Then the startup proceeds normally. I have run 3 different malware programs including Malwarebytes, Avast and Macscan and none detected anything. Anybody have any idea what's going on?