11:01:07 851	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
11:01:29 808	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
11:01:46 157	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
11:03:31 878	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
