So i was playing yesterday then came back after work today to play again and all of the sudden i can no longer play it. i click launch and the message that appears is

"Failed to initialize Direct3D.
Make sure you have at least DirectX 9.0c installed, have drivers for your
graphics card and have not disabled 3D acceleration
in display settings.
InitializeEngineGraphics failed."

So i know for a fact i have the Direct X part but iam not sure how to check/do the others. if anyone could let me know how or how to fix this that would be great. Thanks.