You are the administrator of your company’s network. A user named Tom in the art department wants to update his Windows 2000 Professional computer so that he can view graphics at the highest resolution. Tom downloads a video card driver from the Internet and then asks of your assistance in installing it. You are unsure of the source of driver. You want to ensure that Tom does not loose productive time because of the incompatible driver. What should you do？（）

• A、Install the driver in the computer. Save after installing the driver. Restart the computer, then  use the last known good configuration to recover the original driver
• B、Install the driver in the computer. Save after installing the driver, use hardware troubleshooter  then use Recovery Console to recover the original driver
• C、Display the advance attributes a parallel works for video card driver file. Install the file, if the  contents have been secured
• D、Run file signature verification survey to verify that the driver has a digital signature. Do not  install otherwise.