Have you tried these to get Aero?
1. Sometimes simply going to Control Panel > Classic View > Performance Information & Tools solves the problem.
2. Right-click the Desktop > Personalize > Windows Color and Appearance > open Classic Appearance. Is Aero highlighted?
3. Right-click Computer > Properties and under Tasks select Advanced System Settings (Continue if UAC is enabled) > Advanced Tab then Settings alongside Performance. Visual Effects contains a list of Options, are they all ticked?