Unable to create Direct 3D9 device

 From:  PaQ
1830.3 In reply to 1830.1 
I don't think it will help, but did youn by any chance, changed the hardware acceleration level of you graphic card ?
(Display properties / Advanced / Troubleshoot / Hardware acceleration slider)

I have to change it myself sometimes to keep compability with an old software gui, and forget sometimes to put it back to full acceleration.