USB 3 Hub Command Verifier (HUB3CV) is the official tool for USB 3 Hub Framework testing. All USB 3.0 hubs are required to pass the Hub Framework tests in order to gain certification. The HUB3CV tool includes the xHCI Compliance Drivers for use with the HUB3CV. In order to use HUB3CV, User Account Control (UAC) must be turned off. After turning off UAC, the system must be rebooted. If you are running on 64-bit Windows, you must install the 64-bit CV. If you have any questions, please contact firstname.lastname@example.org. NOTE: The USB3CV tool is supported on Windows 7 and above only.