About the Video Card or Graphics Adapter
Before opening the case, unplug the PC to avoid an electrical shock hazard. Exercise caution as there are sharp edges on a PC and its components. Always wear a static electricity discharge strap and attach the lead to the metal frame of the case, when working with your PC's components to avoid damaging your PC. Note that some manufacturers will void your PC's warranty if you open the case.
It is wise to start by changing your current video resolution down to the minimum settings of 16 color, 800 x 600 dpi and set the refresh rate to "default". These changes are made in the Display section of the Windows Control panel. After saving these changes, shut down Windows and unplug your PC.
That completes the hardware installation, next you will need to start the computer and complete the software installation. Your graphics adapter should have come with a disk which contains the appropriate drivers.
Follow the manufacturer's instructions for installing the software. Windows will detect the graphics adapter and start the hardware wizard; simply follow the prompts. Some manufacturers require you to cancel the hardware wizard and complete the installation using their own installation instructions.
After everything is working, you can go back into the Windows Control Panel and reset the resolution and refresh as recommended by the manufacturer of your monitor. Failure to use recommended settings can result in damage to your monitor.