I purchased a new HP Envy 15 which had Windows 7 installed in it. Aero was activated. A few days later, Aero has been somehow disabled and I can't activate it again. I used the Troubleshooting utility in Windows 7 for Aero -- it says that nothing is wrong. I also tried un-checking and checking the various options in the visual effects menu.
Can somebody please help me? I'm not sure when or how Aero was disabled; the computer did crash and went blank once, and I had to reboot. I'm not sure if that disabled Aero.