As a Certkiller .com technician you have updated the sound device drivers on a workstation. After
this you notice that the sound device is no longer functioning properly. Which of the following could
you use in order to remove the device driver?

A.
Environment Variables

B.
Roll Back Driver

C.
Hardware Profiles

D.
Windows Update

Explanation:
Each time you update a driver, Windows XP automatically saves a copy of the previous driver on
your computer. If you think a recent driver update may be making your computer unstable, you
can use the Driver Rollback feature to get rid of the new driver and replace it with the last one that
worked.