Roland GR-640 User Manual page 132

Accessories, Run, and then click Browse.
Select the name of the drive or folder where the
driver is stored.*
Double-click SETUP64.EXE (64-bit version) or
SETUP.EXE (32-bit version).
If a User Account Control window appears, click
Allow.
The setup program for the driver starts.
Click Uninstall. Select the machine you want to
delete, and then click Start.
If a window prompting you to restart the computer
appears, click Yes.
The uninstall procedure is complete when the computer finishes restarting.
* Download the driver for the machine you want to delete from the Roland DG
Corp. website (http://www.rolanddg.com/), and then select a folder to extract
the files into.