Prolific USB-to-Serial Comm Port (COM8)
Driver Version 2.1.51.238
does not work with unbranded cable.
For Windows XP download and install:
wd_pl2303h-hx-x_v20019v2021.zip
- contains: PL-2303 Driver Installer.exe
Driver Version 2.0.2.1
Yes, this older version is compatible with those pirate Chinese prolific cables.