ucmucsiacpiclient.inf Driver

The ucmucsiacpiclient.inf driver is associated with Microsoft’s UCSI ACPI client, which helps Windows communicate with firmware that manages USB-C connections and related power roles. It may be relevant when a compatible PC shows a UCSI ACPI device error or has USB-C connection issues. Although this listing identifies 3Com and the Network category, this INF is not a typical 3Com network adapter driver, so verify your hardware before downloading.

Key Features

• Supports USB-C management: Helps compatible systems exchange USB Type-C Connector System Software Interface (UCSI) information between Windows and system firmware.
• Enables connector status reporting: Allows Windows to receive information about supported USB-C connection states and power roles.
• Works with system components: Operates alongside compatible BIOS/UEFI firmware and other platform drivers; it does not replace a network adapter driver.
• Supports targeted troubleshooting: Updating the appropriate component may help resolve driver-related UCSI errors, though cable, port, and firmware problems require separate checks.

How to Install ucmucsiacpiclient.inf Driver

1. Verify the device. Open Device Manager and inspect the affected device’s name, status, and hardware IDs. Confirm that it is a UCSI ACPI component rather than a 3Com network adapter.
2. Check OS compatibility. For a ucmucsiacpiclient.inf driver download for Windows, confirm support for your exact PC model and operating system. Do not assume a package supports Windows 11, 10, 8, and 7 simply because those versions appear in a listing.
3. Obtain a trusted package. On Windows 10/11, check Windows Update, including available optional driver updates, and your PC manufacturer’s support resources. Use a free download from an official source and select the latest version approved for your system.
4. Install the supported update. Follow the manufacturer’s installer instructions. If you received an extracted driver package, use Device Manager’s Update driver > Browse my computer for drivers option and select its folder. Do not force an incompatible INF.
5. Restart and test. Reboot if prompted, then check Device Manager and test the affected USB-C connection. If the problem persists, review manufacturer guidance for BIOS/UEFI or platform updates.

Keep this driver updated through Windows Update or your PC manufacturer’s recommended channels. A newer package is not automatically the right one: prioritize compatibility, and avoid replacing a working system driver with an unverified download.

Common Issues and Fixes

• Install fails (Code 10/28 or “driver cannot be installed”): Confirm the `ucmucsiacpiclient.inf` package matches Windows 10/11 and x64 architecture, run as administrator, and update BIOS/chipset so the ACPI UCSI device is exposed. Do not force an older 3Com package onto a newer Windows build.
• Device not detected / Type-C port missing: Enable USB Type-C, UCSI, and Thunderbolt/ACPI support in BIOS. Check Device Manager for “UCM-UCSI ACPI Client”; if absent, this is usually firmware/BIOS, not the INF. Test another cable/port.
• Version conflicts or Code 43 after update: Uninstall the existing UCM-UCSI ACPI Client and 3Com package, delete driver software, reboot, then reinstall the matching package or let Windows use its inbox driver. Roll back if the previous version worked.