did you remove the "composite device" from device manager?
i have no idea if the provided file is the correct driver, but, if it is, you would need to unplug the device, from the usb, go to device manager and find "composite device" right click and remove it. then install the driver. THEN PLUG IN THE DEVICE and see if we can install
consider the possibility that your usb cable OR THE PORT ITSELF are bad. try a different port AFTER INSTALLING THE DRIVER, as well as a different cable
DEPENDING ON HOW MANY TIMES YOU HAD FAILED INSTALLS, you may want to google "usb oblivion" a program that negates all usb device history.
(once agian, always do these things with your device unplugged. plugging in the usb cable to the device is always the last step
even in windows 10, your plotter will not be install without the correct driver. (as a usb device, if it has a db9 or db25 serial port no driver is necessary, but all the settings have to match and the cable has to be the correct "flavor" (standard or null modem)
just putting in my 2 cents,