Standard Serial over Bluetooth link (COM49) Driver

The Standard Serial over Bluetooth link (COM49) driver lets Windows expose a compatible Bluetooth serial connection as a virtual COM port, allowing software to communicate with a paired device. This Microsoft component is useful when connecting equipment that uses Bluetooth Serial Port Profile (SPP), such as certain scanners, GPS receivers, or diagnostic tools, without a physical serial cable.

Key Features

• Virtual serial communication: Provides a COM-port interface for applications designed to exchange data over a serial connection.
• Microsoft Bluetooth integration: Works with the Windows Bluetooth stack and a compatible Bluetooth adapter to support paired serial devices.
• Application connectivity: Lets you select COM49 in software that requires a specific serial port, provided Windows has assigned that number to your connection.
• Windows compatibility: Listed operating systems include Windows 10, 8.1, 7, Vista, and XP. Availability depends on the Bluetooth adapter, Windows edition, and installed Bluetooth software.

How to Install Standard Serial over Bluetooth link (COM49) Driver

1. Check your Windows version and Bluetooth adapter. Before choosing a Standard Serial over Bluetooth link (COM49) driver download for Windows, verify that the package matches your operating system and hardware. For Windows 10/11 systems, do not assume a package listed for Windows 10 also supports Windows 11.
2. Try the built-in driver first. Enable Bluetooth and pair your serial-capable device. Windows may create the virtual serial port automatically when the device’s serial service is configured.
3. Use a trusted update source. Check Windows Update or your Bluetooth adapter manufacturer for the latest version appropriate to your setup. This Microsoft serial-port component is generally supplied through Windows rather than as a separate installer; a free download should not require a third-party driver updater.
4. Install any required adapter software. Follow the manufacturer’s instructions, then open Device Manager and look under “Ports (COM & LPT)” for the Bluetooth serial entry. If necessary, use “Update driver” to search for a compatible driver.
5. Confirm the port and test the connection. Select the assigned port in your application. COM49 is a Windows-assigned identifier, not a distinct hardware model, so your connection may appear under another COM number.

Keep the driver and Bluetooth adapter software updated through trusted sources, especially if pairing or serial communication becomes unreliable. Before an update on an older Windows release, confirm compatibility and retain a working installer or recovery option.

Common Issues and Fixes

• Device not detected / COM49 missing: Confirm the Bluetooth device is paired and the Bluetooth Support Service is running. Remove and re-pair the device, then check Device Manager under Ports (COM & LPT) for Standard Serial over Bluetooth link (COM49). Scan for hardware changes if it is absent.
• Install fails or driver will not start: Restart the Bluetooth Support Service, uninstall the affected serial-over-Bluetooth entry in Device Manager, reboot, and let Windows reinstall the Microsoft driver. Run Windows Update to ensure signed driver files are current.
• COM port conflict / app cannot open COM49: Close any app using COM49, check for stale serial-over-Bluetooth ports in Device Manager, and verify the assigned COM number in Bluetooth COM Ports. Reassign or remove conflicting ports, then select COM49 in your application.