I read the following: "OK, found a log, system profiler system.log, and there seemed to be a lot of waiting for google desktop, which I had a while back, but uninstalled it.
So, I reinstalled it, and uninstalled all my google apps, desktop, earth and updater.
Indeed, my imac now starts up 10 seconds faster !
I'll see how it goes."
How do you do this? I am an idiot when it comes to computers.