The purpose of the BaoFeng Programming USB Cable is to convert the serial interface (Accessed via the mic/headphone jacks) to USB for programming in Windows. The drivers below are for this cable which uses the Prolific PL2303 or a FTDI Chipset these are common chipset used to convert such interfaces.
BaoFeng/QYT Programming Cable Driver (FTDI)
File: CDM v2.12.36.4 WHQL Certified.zip
a8654caa76151e92161e2767294337039189ac3bab3a794dbac791cd1901172b
BaoFeng/QYT Programming Cable Driver (Prolific)
File: P3200.exe
807b8a5a61c7d30149d65f0862eef51fc86e322b96a956ba04ae30fec266632e
BaoFeng/QYT Programming Cable Driver (WCH CH340)
File: CH341SER.ZIP
0b1da457085bdf981ca24de2ab72a24b6460b52375ac886abff0dbec79d360ec