Qualcomm HS-USB PCUI 9025 (COM20) Driver

The Qualcomm HS-USB PCUI 9025 (COM20) driver helps Windows recognize and communicate with the PCUI serial interface exposed by a compatible Qualcomm-based USB device. Listed under Qualcomm Atheros in the USB category, this interface may require a dedicated driver when it appears as an unknown device or cannot be accessed by compatible connection or service software. It is intended for users who need to restore communication with this specific interface, rather than a general-purpose USB driver.

Key Features

• USB-to-serial communication: Allows compatible software to access the device’s PCUI interface through a Windows COM port.
• Device recognition: Helps Windows identify the interface correctly in Device Manager when the matching driver package is installed.
• Support for listed Windows releases: Intended for Windows 10, 8.1, 7, Vista, and XP, subject to the operating systems and architectures supported by the individual package.
• COM port integration: Supports access through an assigned serial port. Although this device is labeled COM20, Windows may assign a different port number after reconnection or installation.

How to Install Qualcomm HS-USB PCUI 9025 (COM20) Driver

1. Check the device and system details. Open Device Manager, locate the interface, and review its hardware IDs under Properties > Details. Confirm your Windows version and whether your system is 32-bit or 64-bit.
2. Choose a matching package. Before starting your Qualcomm HS-USB PCUI 9025 (COM20) driver download for Windows, verify that the package matches those hardware IDs and your operating system. If choosing a free download, use a trusted source and check the publisher.
3. Extract and install the driver. Unpack the downloaded archive if necessary. Run the included installer, or right-click the device in Device Manager, select Update driver, and browse to the extracted driver folder.
4. Reconnect and verify. Follow any restart instructions, then reconnect the USB device. Check that Device Manager shows the interface without a warning icon and note its assigned COM port.
5. Confirm software access. Select the assigned port in your compatible application. For Windows 10/11 systems, verify support separately: Windows 10 is listed for this device, but Windows 11 compatibility is not established by the supplied specifications.

Keep the driver updated when a compatible release addresses a connection problem or software requirement. Choose the latest version that explicitly supports your hardware and Windows release; a newer package is not automatically the right update for an older device.