if the computer boots up ok, go online and find the driver. reinstall. that is the first and easiest thing to do without risking losing stuff. you can do a roll back as buzzbee suggested, but you will probably end up with problems again if you really do have corrupt drivers. restart.
after you have reinstalled the drivers, if you still have problems, open the device manager. delete your cd drives and then reboot your computer. this will force the computer to find the drives and drivers in case it didn't like the reinstall of the drivers.
if that doesn't work, try the rollback, or repair. you may also have damaged cd drives. the computer does not think. it gives you the error message closest to what is listed in it's error parameters.