KYORITSU KEW PQA MASTER Windows Vista - Manual (Page 6)

(13) When 2 being installed as shown in the lower figure, a driver was normally installed.
USB Driver Un-installation
When install of the USB driver is interrupted and reinstall cannot be
done, follow the procedure below and delete the existing driver, and
then install it again.
(1) Connect a PC and the instrument with a USB cord.
(2) Click the “Control Panel” in the Start menu.
(3) Click “Device Manager” in the Control panel.
(4) Right click on “KEW POWER ANALYZER 6310” in the Other devices.
(5) Click “Uninstall” to uninstall the USB driver.
(6) Remove the USB cord connecting your PC and the instrument once, and connect them again.
(7) When “Found New Hardware Wizard” window appears, follow the
procedures described at “USB Driver Installation” and install the driver.