20:18:41 871	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x1f
20:18:41 871	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x1f
20:18:41 871	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x1f
20:19:29 358	Error:EnumerateHub-->DeviceIoControl failed,err=0x1f
