Black Screen during graphics card install on Windows 8.1

[Genesis123]

Hello. Somehow when my screen flickers while trying to install the graphics card, on the last flicker the screen goes black after the brightness changes. Before the install I couldn't change the brightness without the graphics card installed. I went to the Device manager to uninstall the Video Game Controller (VGA Compatible) display then after I do that the graphics card installs and then repeats a black screen. So then when I reboot I can't make it to the login screen because there's a black screen with the actual graphics card installed. Please help. Give the most advice. Thanks!

[Pankaj]

If you updated the display driver, rollback and use and older version.
If you have not updated, check if there are any updates available for the graphics driver,

[vasudev]

Adding to what Pankaj has said, are you adding a new graphics card? Does your system already has an onboard graphics card? Have you tried the graphics card on some other system?