The Belarc Advisor...
 

The Belarc Advisor builds a detailed profile of your installed software and hardware, missing Microsoft hotfixes, anti-virus status, CIS (Center for Internet Security) benchmarks, and displays the results in your Web browser. All of your PC profile information is kept private on your PC and is not sent to any web server. http://www.belarc.com/images/spacer.gif

• Operating Systems: Runs on Windows Vista, 2003, XP, 2000, NT 4, Me, 98, and 95.
• Browsers: Requires IE 3 or Netscape 3, and higher versions. Also runs on Opera, Mozilla, and Firefox.
• File size: 1428 KB.
• License: The license associated with this product allows for free personal use only. Use on multiple PCs in a corporate, educational, military or government installation is prohibited. See the license agreement for details.

Download: http://www.belarc.com/Programs/advisor.exe
home page: http://www.belarc.com/free_download.html