normally the only software you should register is Windows. Thats the only software i register; a reason why would be a situation like this. here's what i would do;
Launch REGEDIT by selecting Start/Run, typing REGEDIT in the text box and pressing Enter.
To find the Windows CD Key: find Windows, click the "current version" with the + sign, don't click the +sign, click on the words "current version". The product ID and the product key will appear. It's all the numbers and letters that you see.
· Highlight, Press Control C to copy the CD key to the clipboard, then paste it someplace where you can reuse it. Some experts advise compiling all your keys to a text document, then printing it out for safekeeping.