Belkin F5U003 USB Serial Port (COM4) Driver

The Belkin F5U003 USB Serial Port (COM4) driver allows Windows to communicate with the USB-to-serial adapter so compatible serial devices can connect through a USB port. This driver page is intended for users setting up the adapter, restoring a missing COM port, or troubleshooting a connection that stopped working.

Key Features

• USB-to-serial communication: Provides the driver interface needed for compatible serial equipment and applications to communicate through the adapter.
• COM port access: Makes the adapter available as a serial port in Windows. Although this device is listed as COM4, Windows may assign a different port number on your computer.
• Windows compatibility: Listed operating systems include Windows 10, 8.1, 7, Vista, and XP. Verify that the individual package supports your Windows version and system architecture before installing.
• Device identification: The driver listing identifies Etek Labs as the vendor. Matching the adapter’s hardware IDs with the package details helps avoid installing an unrelated USB driver.

How to Install Belkin F5U003 USB Serial Port (COM4) Driver

1. Check your system. Confirm your Windows version and whether it uses a 32-bit or 64-bit architecture. For Windows 10/11 systems, note that Windows 10 is listed as supported, but Windows 11 compatibility is not confirmed here.
2. Verify the package. Before starting your Belkin F5U003 USB Serial Port (COM4) driver download for Windows, compare the supported systems and hardware IDs with your adapter. When choosing a free download, use a trusted source and check the package’s origin.
3. Download and extract. Save the compatible package and extract it if it comes as a compressed archive. Review any included installation instructions before connecting the adapter.
4. Install the driver. Run the supplied installer, if available. Otherwise, open Device Manager, locate the adapter or unidentified USB device, select Update driver, and browse to the extracted driver folder.
5. Test the connection. Restart if prompted, then check Device Manager for the assigned COM port. Select that same port in your serial application and match the communication settings required by your connected equipment.

Keep a copy of the working driver before you update. Check for the latest version compatible with your exact adapter and Windows installation, especially when troubleshooting connection issues. A newer package is useful only if it supports your hardware; avoid replacing a stable driver with one intended for a different USB-to-serial device.