Make sure you have reset your OC settings back to their defaults, a display driver error means your GPU isn't functioning, you may have overclocked it too far and burned it out. The GTX 660 Ti doesn't give a very stable overclock if you don't have the PSU/Cooling to support it.
When...
Well turns out a lot of the originals were steaming piles of turds for human beings, so they're long gone now. Some of the better ones moved on and we miss them dearly.