USB Serial Port (COM5) Driver

The USB Serial Port (COM5) driver lets Windows communicate with a connected USB-to-serial interface, which may be used to link a printer or other serial device to your PC. You may need it if your printer software cannot access COM5, Device Manager shows a warning, or Windows does not recognize the adapter after a connection or system change.

Key Features

• Serial communication support: Enables compatible software to exchange data with a printer through a USB-to-serial connection.
• COM port access: Makes the adapter available as a serial port in Windows so applications can select it for communication.
• Configurable connection settings: Depending on the adapter, allows settings such as baud rate, parity, and flow control to match the connected equipment.
• Windows compatibility: Driver packages may support Windows 11, 10, 8, and 7; check the specific package against your adapter and system architecture before installing.

How to Install USB Serial Port (COM5) Driver

1. Identify the adapter. Open Device Manager and find USB Serial Port (COM5) under Ports (COM & LPT), or locate the unrecognized device under Other devices. Open Properties > Details > Hardware Ids to identify the underlying hardware. COM5 is an assigned port number, not a unique adapter model.
2. Choose the correct package. Before starting a USB Serial Port (COM5) driver download for Windows, confirm that the package matches the hardware ID and your Windows version. For Windows 10/11, check the supported architecture as well. Prefer a verified free download from the manufacturer.
3. Install the driver. Run the downloaded installer and follow its instructions. If the package contains driver files without an installer, extract them, select Update driver in Device Manager, and choose Browse my computer for drivers.
4. Reconnect and verify. Restart if prompted, reconnect the adapter, and confirm that Device Manager lists the serial port without a warning icon. Windows may assign a port number other than COM5.
5. Configure your printer software. Select the assigned COM port and use the communication settings specified by the printer manufacturer. Install a separate printer driver if your printing application requires one.

Keep the driver updated when the manufacturer releases a compatible update that addresses connection problems or Windows compatibility. Check that the latest version still supports your adapter and operating system before replacing a working driver, especially on Windows 7 or 8.

Common Issues and Fixes

• Driver install fails (Code 10/28): Uninstall the existing USB Serial Port driver, disconnect the adapter, run the manufacturer’s latest installer as administrator, reboot, then reconnect. Avoid Windows Update generic drivers if they fail.
• Device not detected / COM5 missing: Try a different USB cable and port. Check Device Manager under “Ports (COM & LPT)” or “Other devices.” Install the correct chipset driver (FTDI, Prolific, CH340, etc.) for your adapter; hidden devices may need “Show hidden devices.”
• Version conflicts / COM port changes: Remove duplicate or old USB serial drivers, then reinstall the manufacturer-supported version. If COM5 is reassigned, set it in Device Manager > Port Settings > Advanced; do not force an incompatible driver.