The "Quad RS232-HS" device is a high-speed USB-to-serial converter, typically powered by the chipset, which provides four independent RS232 serial ports from a single USB connection . To ensure these ports are recognized correctly by your system, you must install the appropriate Virtual COM Port (VCP) drivers. Where to Download Quad RS232-HS Drivers
The most reliable source for these drivers is the official website, as they manufacture the underlying hardware used by most Quad RS232-HS adapters. Drivers - FTDI quad rs232-hs driver download