Standard Serial over Bluetooth link (COM25) Driver

The Standard Serial over Bluetooth link (COM25) driver allows Windows applications to communicate with a paired Bluetooth device through a virtual serial port. This Microsoft component is useful when compatible equipment, such as a scanner, GPS receiver, or serial adapter, uses the Bluetooth Serial Port Profile (SPP) rather than a physical serial cable.

Key Features

• Virtual serial communication: Provides a COM-port interface that compatible software can use to exchange data with Bluetooth serial devices.
• Microsoft Windows integration: Works with the Windows Bluetooth stack and a functioning Bluetooth adapter driver to support serial connections.
• Application compatibility: Lets programs that accept serial connections use the assigned COM25 port when it is configured for the intended device.
• Device Manager management: Allows you to check driver details, review device status, and troubleshoot the virtual port within Windows.

How to Install Standard Serial over Bluetooth link (COM25) Driver

1. Check your Windows version and hardware. This listing covers Windows 10, 8.1, 7, Vista, and XP. Confirm compatibility with your specific Windows release and system architecture before choosing a download. If you are searching for Windows 10/11 support, note that Windows 11 compatibility is not confirmed by this listing.

1. Verify the Bluetooth connection. Enable your Bluetooth adapter and pair the serial device with your PC. The connected equipment must support SPP; ordinary Bluetooth pairing does not always create a serial port.

1. Choose a trusted driver source. Before starting a Standard Serial over Bluetooth link (COM25) driver download for Windows, check Windows Update and your PC or Bluetooth adapter manufacturer’s support resources. This Microsoft serial component is commonly supplied by Windows, so a separate free download may not be necessary.

1. Install or update through Device Manager. Look under Ports (COM & LPT) for Standard Serial over Bluetooth link (COM25). Right-click the entry, choose the driver update option, and search automatically or select a verified, compatible driver folder. Menu wording varies by Windows version.

1. Test your application. Restart if prompted, then select COM25 in your serial software. Match any communication settings required by the equipment. If the port is missing, check the adapter driver, pairing status, and available Bluetooth serial services.

Keep the Bluetooth adapter driver and relevant Windows components updated using trusted sources. The latest version should match your operating system and hardware—not simply have a newer label. COM25 is an assigned port number, not a separate hardware model, and it may change after re-pairing or reinstalling the device.

Common Issues and Fixes

• Install fails (Code 10/28 or “driver unavailable”): This is usually the Microsoft in-box Bluetooth serial driver. Remove the COM25 entry in Device Manager, unpair and re-pair the Bluetooth device, then let Windows reinstall “Standard Serial over Bluetooth link.” Avoid forcing an unrelated vendor .inf.
• Device not detected / COM25 missing: Confirm Bluetooth is on and the device is paired with the Serial Port Profile (SPP). Enable “Show hidden devices,” restart the Bluetooth Support Service, delete stale COM ports, and re-pair. Make sure another PC isn’t holding the device connection.
• Version or COM-port conflicts: If an app expects COM25 but Windows reassigns it, open Device Manager > Ports > COM25 > Properties > Port Settings > Advanced and select a free COM port. Update the Bluetooth adapter driver from your PC vendor and avoid installing multiple serial-over-Bluetooth stacks.