The make and model of the machine helps immensely.
i have a question regarding something called a multimedia video controller. is this something i can to buy by itself, or is it part of a video card? i ask because when i go to control panel>system>hardware>device manager to the left of multimedia video controller there's a yellow question mark with a yellow circle inside it with an exclamation mark inside the circle. if i right-click on multimedia video controller and select properties it says, under device status, "this device is not configured correctly-to reinstall the drivers for this device, click reinstall driver." i click reinstall driver and, eventually, get "cannot install this software, etc." which is why i wondered if a multimedia video controller is part of a video card or something i can buy by itself. please let me know if you need any additional info. as i'm not sure what all to include.