11:22:54 257	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
12:18:30 622	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
12:52:01 364	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
13:21:36 112	Error:EnumerateHubPorts-->DeviceIoControl failed,err=0x48f
