HP un2420 HS-USB QDLoader (COM4) Driver

The HP un2420 HS-USB QDLoader (COM4) driver helps Windows recognize the Qualcomm-based download interface associated with an HP un2420 mobile broadband module. It is intended for users whose device appears as an unknown USB device or needs the correct driver for authorized diagnostics, servicing, or recovery—not for enabling everyday mobile broadband connectivity.

Key Features

• USB device recognition: Provides the driver association Windows needs to identify the HP un2420 HS-USB QDLoader interface in Device Manager.
• Service-tool communication: Allows compatible diagnostic or recovery software to communicate with the module when it is in download mode.
• COM port identification: Supports recognition of the interface as a serial port. Although the device name includes COM4, Windows may assign a different port number.
• Legacy Windows support: Intended for Windows 10, 8.1, 7, Vista, and XP, subject to the specific package’s supported versions and system architecture.

How to Install HP un2420 HS-USB QDLoader (COM4) Driver

1. Confirm the device identity. Open Device Manager and locate the QDLoader entry or unidentified device. Check its hardware IDs under Properties > Details to confirm that they match the driver package.
2. Choose a compatible package. Before starting your HP un2420 HS-USB QDLoader (COM4) driver download for Windows, verify the supported operating system and whether your installation is 32-bit or 64-bit. For Windows 10/11 systems, note that Windows 11 support is not listed here and should not be assumed.
3. Download and check the files. Select a trusted source offering a free download, then extract the archive if necessary. Check the publisher and any digital signature before running an installer.
4. Install the driver. Use the supplied setup program, or right-click the device in Device Manager, select Update driver, and browse to the extracted driver folder. Follow the prompts without disabling Windows security checks.
5. Verify recognition. Restart if prompted, then check Device Manager for the device name, assigned COM port, and any warning icons. Installing this driver alone does not recover firmware or restore broadband service.

Keep the driver updated when a compatible release addresses a problem or improves support for your system. Choose the latest version that explicitly matches your hardware and Windows edition, rather than assuming a newer package is suitable. Before an update, keep a copy of the working driver so you can roll back if necessary.