The CPU is easy. You either have a 2 core CPU that runs 2 threads each (i.e. 4 total) or 4 cores running 1 thread each (4 total). The device manager is just showing all physical and logical cores. The others depend on your mobo hardware and it's configuration and the peripherals that you have attached. It's not unusual because the operating systems needs monitor all the hardware and physical ports, even if the port doesn't have a device plugged into it.