Look, this is screwy. I too receive the "background process" message and I haven't found anything that's fixed it.
I've turned off the anti-virus program, tried a couple of the terminal approaches and, most importantly, I did everything detailed in the Mac Support "SOLUTION," trashing various files, reinstalling the designated programs and installing the new updates.
I mean, +come on+. There's an answer out there for me, right? Point me in the right direction.