I was helping a client setup some Windows XP machines (yes I know…. I know… old stuff) and we entered in one machines key against another machine by mistake. Now I’m a stickler for detail and really wanted things to line up right. There’s a Microsoft KB that tells you how to do it, but it involves regedits and scripts – surely there is a better way. I did a quick search on the net and found Magical Jelly Bean Keyfinder.
This free little utility will display your product key for you AND allow you to change it – a great tool that can get you out of a spot – as it did with me. Note there are some limitations – the free version won’t be able to show you Windows 7 or Office 2010 product keys.