Introduction: Why Your BU-353S4 Needs the Right Driver on Windows 11

The GlobalSat BU-353S4 is a legendary puck-style GPS receiver, cherished by sailors, truckers, GIS professionals, and aviation enthusiasts for its rugged build and reliable SiRF Star IV chipset. However, with the rollout of , Microsoft introduced stricter driver signature enforcement and changes to how legacy COM ports are handled. As a result, many users searching for "G Star IV GPS Driver Download BU-353S4 Windows 11" find themselves staring at an unresponsive device or error code 10 in Device Manager.

Save the Prolific driver installer to a USB stick. Windows 11 updates (especially major feature updates like 24H2) sometimes revert or block this driver. Having the installer at hand will save you from repeating this entire search process. Last updated: May 2026 – Verified with Windows 11 Pro (23H2 and 24H2 builds) and GlobalSat BU-353S4 hardware revision 4.0.

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