Why did my Aero Stop working?

[AWS]

I've read that the Update KB2670838 is causing wide spread problems. I've uninstalled this and reinstalled this. I've done a system restore. My Aero was working fine for over a year. But I have more problems as well. When I try to get Aero to work it shuts

off my personalized sounds and screen saver and resets them to the windows Default. I change my screen saver back click on my Saved Aero Theme and it again turns off my screen saver and resets my sounds. I took the machine back to the company that built it.

They reinstalled Windows 7. It worked fine for a few days. I installed a few programs and now it's right back to doing the same thing. I installed Google Earth and Microsoft Expression Encoder 4 and Screen capture Codec. Could these be causing the problems?

 

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