I'm at my wits end here. I tried typin gin two product keys that I have and they are not working. I tried magicaljellybean to extract it but that didn't do anything and I can't find where to just get a new one. Can anyone offer any helpful advice that will just get me to the solution? It's asking for a product key, I don't have one. How do I get a new one? Free or buy one. And I'm worried that if I wait too long then I won't be able to use my computer. And I just paid over $200 to get the hard drive replaced. Ugh.

Also, I have Vista.

Other options: http://www.mydigitallife.info/2006/11/05/view-and-retrieve-or-change-windows-xp-vista-2003-2000-and-more-and-office-xp-2003-92-product-key-or-cd-key/

Product key to what? If its for Windows, it should be on a sticker attached to the computer. If that doesn't work, did you have a shop replace the hard drive? They may have loaded their version of Windows and you need to get the key from them.