graphics driver not found

I have install CUDA 7.0 version on windows 7 (64-bit), at the time of installation . It displayed message
the graphics driver could not find the compatible hardware. then i continued to install . later i tried to install Java ,by following the Java link for installation and then return to Drivers page. - See more at: .
but still i cannot run CUDA.
I even install visual studio 2013, 2012, 2010 on my laptop.
what i am suppose to do now.

What CUDA-aware application are you trying to use? What graphics card do you have in your computer?