10:26:17 093	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
10:34:40 741	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
10:35:18 731	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
10:35:34 676	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
