Here is another tool, which is just an EXE (no installation required), called System Spec.
System Spec - A Portable Freeware System Information Utility.
System Spec gives you a complete specification and system information of your PC. This includes hardware, software and settings.
With System Spec you can see, save and print a complete spec of your PC. This standalone, system information utility can also perform various windows functions. Additional advanced info includes CPU, drives, applications, display, memory, networking, internet, CD / DVD drives and more.