Roland GR-640 User Manual page 128

Uninstalling the Driver
(Windows 8.1)
To uninstall the driver, follow the procedure below.
Procedure
Switch off the machine, and then disconnect the
connector cable between the computer and the
machine.
Start Windows.
Click Desktop.
Move the mouse pointer to the lower-right corner
of the screen to display the Charms bar, and then
click Settings.
Click Control Panel, and then click Uninstall a
program.
Select the driver of the machine you want to delete