If that's the case, I'd uninstall whatever video drivers you have now, from the Programs section of the Control Panel, and then install the lastest ones from the link I posted above. That will be your first step to finding out what's up with Aero.
My Computer
- OS
- Windows 7 Ultimate x64 SP1
- CPU
- Intel Core i7-2600
- Motherboard
- Gigabyte GA-P67A-UD3P-B3
- Memory
- 12 GB Patriot Extreme DDR3-1333
- Graphics Card(s)
- Nvidia GTX 470
- Monitor(s) Displays
- Dell UltraSharp 2209WA
- Hard Drives
- OCZ Agility3 240 GB, WD5001AALS, WD7501AALS
- PSU
- OCZ ModStream 700W
- Case
- CoolerMaster HAF 912 Advanced
- Cooling
- CoolerMaster Hyper 212 Plus