You should have save your graphic drivers.
Anyway, if you can get on the internet, try to find both the motherboard and video drivers for your system. Or, you could go into device manager, select the video adapter and try to update the adapter using windows update service. Sometimes that works. Or do it like this:
Here is a screen shot:
You can get to the drive from the desktop. > display properties > adapter >driver >update drive.
And pick windows update. Otherwise you have to get it off hte site of whoever made your computer and video graphics.
