hi ,i bought a new pc ,it's a lenovo with an intel i7-4790 board,
it has a built in vga, but i needed a powerful one so i got the nvidia gt 630 and plugged it in, when i start the pc i get the info of the vga ,on startup,but when the windows log in and i go in the device manager, i find that the display adapter is "Microsoft basic display adapter"
i downloaded the gt630 driver ,when i try to install it ,the driver starts a search for a compatible hardware and cannot find one.

how can i fix this problem? i have windows 8.1 64 bits