Many tools and utilities available now to get your PC information and data. However, you can use Windows simple tool to get your PC information from DOS command prompt.
Just open your DOS command prompt from "Start | Run" and type "cmd". Or you can choose "Start | Accessories | Command Prompt" from Start Menu. After DOS command prompt window is opened, type systeminfo then press Enter key. Now you can analyse your PC information with this simple way without using any extra tools or utilities.

SystemInfo

Get your PC information from DOS command prompt with SystemInfo

Note: If you get an error message, probably you might not activated DCOM Server Process Launcher service. Open your Services window from "Start | Control Panel | Administrative Tools | Services" then start "DCOM Server Process Launcher" service.