SYSInfoMonitor is an Open Source, freeware, portable system information tool.
The first thing you notice is that it has a modern, attractive, and easy-to-use interface considering it is less than 2MB in size.
Categories include CPU, graphics, storage, operating system, network, audio devices, and more. Under the more section, you can find information about your motherboard, BIOS, and printers.
Each category gives you the option to copy or save the information so that you can share or save your computer information.
There are definitely more detailed system information apps out there, but SYSInfoMonitor makes getting most of your system information simple enough for any skill level.