HELP PLEASE :( problemas with update

i have a problem with windows
i recently downloaded the update for bootcamp (bad idea)
so... the installation asked me, do you want to restart, click ok
and when the computer restart, i have a HORRIBLE resolution
600x800 :S and i can´t change it, i try to put it back on screen options, configuration etc etc, and no effect

any ideas? help please

OK i just fixed the problem

here is how:
i go to control panel, then go to
Add and remove programs, Find the one that saids Ati Display driver (or something like that)
remove it, restart.
ok now with your Leopard CD, install the Ati Drivers and its done


o and btw, i have windows UE
so thats why i didn´t use the Restore System option, i dont have it