20:16:31 706	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
20:16:39 123	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
20:17:19 729	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
20:17:21 626	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
20:17:49 618	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
