Whilst I was installing my various apps on my new system I suddenly noticed that the Aero theme had completely vanished. I had previously installed my copy of Spore which also installed DirectX 9.0c and I assumed that this may be the reason.
The Desktop had switched back to classic mode and no matter how I tried I could not find anything related to getting it back. Even selected one of the preinstalled Aero themes didn’t switch correctly. After a long slog around the internet I had found a few things to try.
The first was the obvious system reboot. Nothing changed. I then checked that the two services that manage this in the background were running correctly. The two services are:
- Desktop Window Manager Session Manager
These were both correctly running and setup to start Automatically when the OS boots. The next thing I tried was to run System File Checker, to run this open a command prompt and execute this command:
This performed a file system check on the machine but didn’t find any problems. I then ran the Aero Troubleshooter and the online diagnostic tool both of which didn’t find any issues. Still no Aero theme on my machine.
I then simple restarted the Desktop Window Manager Session Manager service and low and behold Aero returned! That is very puzzling since I performed a reboot on the machine which would have obviously restarted this service when the OS rebooted.
Basically, I had installed an older application (pre-Vista) called Starry Night Pro 4.5, now when I launch this app Windows 7 turns off Aero as the application loads using OpenGL but now when I close this application Windows 7 correctly re-enables Aero. Happy Days!