Although the UM1ex does not come with a driver disk, WIndows
may install a generic driver for this. To Check:

Go to your desktop, right click on “My Computer and choose “Manage” In the computer management window choose “Device Manager”. Expand the Window, and look at the list. Go to “Sound Video and Game Controllers” Click on the “+” sign to the left of the speaker Icon. Look at the resulting list: Do you see the Edirol entry? If not go here:
http://www.rolandus.com/support/downloads_updates/eula.aspx?DownloadId=880
Download the driver and open the “ReadME” file for instructions.