First of all drivers do not expire. Unless your graphics were messed up you didn't need to update them.
ATI drivers are not real easy to install. First of all, yu needed to download the correct driver file for your ATI card/chip and the version of Windows you use. You may have downloaded the wrong one.
Don't try to uninstall the drivers from safe mode. Instead, look for the option in the same area to roll back the drivers to the previous version. That should get you back where you started. Then if you need to update the drivers you can try downloading the correct driver again.
Do you know what ATI card you have? Post it here.