New install of Win 7 - WMC cant find video decoders

[Pendragon]

I've just had to reinstall Win 7 on my HTPC (hardware problem) all the installation went OK but when I start WMC it has all the channels in the guide but when you click to play it tells me it cant find video decoders.
Something I've never struck before.
Help

 

[Pendragon]

Solved the problem after a lot of thinking - was the AMD Catylist Control center causing the problem.