Audit you PC
Today I needed to find out details of my motherboard, I came across Belarc Advisor, really excellent! It provides details of hardware, software, patch levels and much more, the feature I really liked was it tells me the Microsoft licence keys I used to install the SW, which is really useful as I am always loosing track.
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.