18:07:49 254	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
18:16:43 576	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
18:20:00 937	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
18:39:51 965	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
