The programming cable (often a Prolific PL2303 or FTDI chipset) requires a driver:
Avoid torrent sites. Instead, try:
Filename to look for: TC-508_CPS_Setup.exe, Hytera_TC508_Programming_Tool.zip, or Hytera_CPS_V5.03.zip. Hyt Tc-508 Programming Software Free Download
If you download from an unknown source, you risk: The programming cable (often a Prolific PL2303 or