Roland Edirol PCR-30 Owner's Manual page 172

Troubleshooting
"Found unknown device" appears even though you installed
the driver
If your computer or USB hub has two or more USB connectors, and you connect the PCR-30/50/80 to
a USB connector to which the PCR-30/50/80 has never been connected before, the "Unknown device"
dialog box may appear even on a computer onto which you have already installed the driver.
Refer to "Setup" (p. 13), and install the driver once again. This is not a malfunction.
If the "Found unknown device" dialog box appears even though the PCR-30/50/80 is connected to
the same USB connector as before, it is possible that the computer has detected the PCR-30/50/80
incorrectly. Please reinstall the driver from the beginning of the procedure. ( "Setup" (p. 13))
An "Unknown driver found" dialog box appears, and you are
unable to install the driver
Device Manager shows "?", "!", or "USB Composite Device"
Driver is not installed correctly
It is possible that the computer has detected the PCR-30/50/80 incorrectly. Please reinstall the
driver from the beginning of the procedure. ( "Setup" (p. 13))
Can't install/delete/use the driver in Windows XP/2000
• Did you log on to Windows as a user with administrative privileges?
In order to install/delete/re-install the driver in Windows XP/2000, you must be logged into
Windows as a user with administrative privileges, such as Administrator. For details, please
contact the system administrator for your computer system.
• Did you make "Driver Signing Options"?
In order to install/re-install the driver, you must make "Driver Signing Options".
(Windows XP
Windows XP/2000 displays a "Hardware Installation" or "Digital
Signature Not Found" dialog box
• Did you make "Driver Signing Options"?
In order to install/re-install the driver, you must make the settings described in "Driver Signing
Options".
(Windows XP
172
p. 14, Windows 2000
p. 14, Windows 2000
p. 18)
p. 18)