Whenever i try to open League of Legends (a video game) i get an error that says " failure to load Direct3d" I've looked for a solution online and found a post that said to enable direct3d in dxdiag. I tried to do this, but when I opened dxdiag it said that direct3d is unavailable. I'm pretty sure there is a mistake here.
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More aboutdirect3d problems build
well, try to install this version of DirectX 9.0c (Jun 10)