Actually, I just found another thread on the HP website ( http://www.thenextbench.com/t5/HP-Envy-Notebooks/seems-that-all-my-Envy-15-problems-are-not-unique/m-p/50174 ) that reveals that the Aero problems on the Envy 15 are a commmon situation.
The suggested solution is uninstalling stardock.
I uninstalled Stardock and my Aero problem was instantlly fixed
. . . and HP tech support wanted me to do a System recovery/system restore--good grief!!