HWiNFO and HWiNFO32 are professional hardware information and diagnostic tools supporting latest components, industry technologies and standards. Both tools are designed to collect and present the maximum amount of information possible about computer's hardware which makes them suitable for users searching for driver updates, computer manufacturers, system integrators and technical experts as well. Retrieved information is presented in a logical and easily understandable form and can be exported into various types of reports. Currently, there is a Windows version (HWiNFO32) and a DOS version (HWiNFO).
I've used HWiNFO32 in the past couple of weeks to help out with some computer upgrades to include the recent attempt to upgrade my father-in-law's PC to Windows Vista. I recommend this tool if you want a quick way to determine exactly what is inside a PC or laptop.
Download the tool here: HWiNFO32