20Touch Pad9 Following the operating instructions of the connected external mouseor trackball, install the necessary driver.When you want to re-enable the touch pad and touchscreen1 Uninstall the driver or application software of an external mouse ortrackball. (Refer to the operating instructions of the external device onhow to uninstall the driver.)If the explanation of uninstalling the driver or application software can not be foundin the operating instructions for the external device, execute the following steps.A In [start] - [Control Panel] - [Performance and Maintenance] - [System] -[Hardware] - [Device Manager], when an external mouse or trackball device isdisplayed in [Mice and other pointing devices], press Del to delete it.B If the confirmation message is displayed, select [OK].2 If the display asks you to restart Windows, select [No].3 Power off your computer (⇒ Operating Instructions "Starting Up/Shutting Down") and remove the external mouse or trackball.4 Turn the power on and run the Setup Utility (Î page 88).5 In [Main] menu, set [Touch Pad] and [Touchscreen] to [Enable].6 Close the Setup Utility by pressing F10. At the confirmation message,select [Yes].7 Log on to Windows with the administrator authority.8 Select [start] - [Control Panel] - [Printers and Other Hardware] -[Mouse] - [Hardware].9 Confirm that [touchpad/touchscreen] is displayed at [Devices].A Select the external mouse or trackball and then select [Properties].B Select [Driver] and then select [Update Driver].