Keithley 708B Reference Manual page 501

Section 8: Troubleshooting guide
8. If the incorrect driver is installed, click OK.
9. On the Driver tab, click Update Driver.
10. Browse for the driver; select the C:\windows\inf folder and you should see the winusb.inf file.
Select this and make sure the driver is now in use.
11. If this does not work, uninstall VISA, unplug the instrument and follow the steps to reinstall VISA
in the section
8-4
Figure 94: Driver File Details dialog box
Modifying, repairing, or removing Keithley I/O Layer software
Models 707B and 708B Switching Matrix Reference Manual
707B-901-01 Rev. A / August 2010
(on page 2-64).