Dell :: No Standby And Hibernate After Drivers Update

I was trying to update my drivers, I went to dell website and got a few update for my drivers, but now, my computer won't go into standby or hibernate. If I try to go into standby, after I see the "preparing to standby" my computer goes black and the on light still on, then I can't wake the system up I have to press and hold the power button and reestart. When I try to go into hibernate mode after "preparing to hibernate" I see a blue screen with that says something like "an error has happened and windows has been shut down to prevent damage to my system, the problem could be caused by a new software or driver... etc" After I restart it says, your system has recovered from a serious problem and then it ask me to send a report error, I do and then my web browser and open this: [url]I know the problem was a driver that I was trying to update to make my computer work better but instead it messed up. How do I undo the updated drivers?