Tweaking.com - System Information is designed to pull information about your system in the fastest possible way. This small application can identify your computers hardware, software, startup items, processes and more in seconds and requires no installation. All the information can be saved as a text file to be looked at later. Wicked handy.

There are 3 levels of details the program can provide.

Basic:
Basic mode will pull only the basic info for each section.

Moderate:
Moderate will pull even more information than basic.

Advanced:
Advanced will pull all possible information for each section.