Windows does not detect graphics card?

So i used to have windows xp pro on my old pc and i decided to upgrade it to windows 7 32 bit ultimate. It was successful but now windows does not recognize the graphics card it just shows i have the standard vga adaptor which is my motherboards intergrated graphics i'm guessing. I remember my graphics card was my intel. I used to be able to play games such as battlefield 2 and minecraft on windows xp and now i can't even open those games or play youtube videos without it lagging. I have tried all the troubleshooting techniques but they don't work. Can you please help

Try Windows Update, it should install the driver you need.

Which gfx card do you have?

When you installed windows you lost all your motherboard drivers. Your not likely going to solve this with windows updates unless you're really lucky. You need to A: find and use your drives CD that came with your PC, or B: figure out what motherboard and bios you are using and download all the available updates and drivers form the manufacture.