Nikki,
When you boot up your computer the first thing you see on the screen is the make and model number of your video card. Be prepared to hit the pause key on your keyboard, because that information will normally go by pretty fast.
It appears that your video driver was deleted and needs to be reinstalled. You will need that information I spoke of above to determine what to download.
That, of course, presumes that I understand what this thread has been about.