You administer an Active Directory domain that includes portable computers that have Windows 7
SP1 installed. You tog on to one of the portable computers by using a domain user account and
install a new device driver for a bar-code scanner.
You restart the portable computer after installing the new device driver. You successfully log on to
the computer by using a domain user account. .
After logging on, you discover that the bar-code scanner is not working due to a driver error. You try
to remove the installed driver, but the Roll Back Driver option is unavailable.
You need to be able to roll back the driver to its previous version.
What should you do?

A.
From the Local Group Policy, modify Device Installation Restrictions.

B.
Run the Device Manager by using elevated permissions.

C.
Start the portable computer from the Windows 7 installation media and select Startup Repair.

D.
Start the computer and select Last Known Good Configuration from the advanced startup options.