Aero is no longer available

I am using Windows Server 2008 with the Desktop Experience featur
installed so I can use the Aero theme. I had been using it without
problem for about 4 months. This morning after turning on my compute
Aero is nowhere to be found it is no longer in the Color Scheme are
under the Personalize -> Window and Color Appeareance. I have no
installed any new programs in the last few days

I tried to reinstall my ATI video card drivers but that didn't solv
the problem. I am using a Radeon HD 4850 which more than meets th
requirements to run Aero

I've looked at previous posts and have already checked to make sure th
Themes and Desktop Window Manager Session Manager services ar
automatically running

Running the rundll32.exe Dwmapi.dll,DwmEnableComposition command in th
search bar and the run windows also didn't help

Anyone else have suggestions as to how to fix this problem

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zoop
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