Well ignoramus umm... II,
You state the make and model of the computer so we know what to find for you. You then click whatever link we supply and download the files at the link location and then install the new drivers.
Click: Start>Help and Support>Undo changes to your computer with System Restore>Restore my computer to an earlier time>next
A calendar appears, click on a date in bold type that is a date before you messed up your computer and then click Next.