Thanks for the reply, but I'm still stuck.
System restore did not work because my computer had not created any restore points for me to go back to.
When I manually installed the .zip version of the update, I was told I was already up to date with the Standard VGA graphics adapter from 2006.
I entered my computer model into the dell website and they recommended 4 driver upgrades but for other things aside from graphics/display. I guess I don't really understand what's going on. I downloaded the BIOS update from Dell (which seemed to work) and that's it.