10:25:00 989	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
13:34:05 470	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
13:37:08 396	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
16:20:56 826	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
16:29:59 797	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
