Windows 11 "Windows Update" will typically fail to find the correct driver. Manual download is required.
Windows 11 removed legacy support for the older PL-2303 (Prolific) USB-to-serial chipsets that many original BU-353 units used. While the BU-353S4 often uses a CP210x (Silicon Labs) or newer PL-2303 revision, Windows 11 may: G Star Iv Gps Driver Download Bu-353s4 Windows 11