Your Windows 10 product key may be necessary to unlock all features -- but it's not easy to find. Here's where to look for the product key (even if it's lost).

Need to save or write down the Windows Vista product key on your current PC? A beta version 2.0 of the previously-mentioned Magical Jelly Bean Key Finder app has been released, which reveals the ...

Dreamweever66 needs to reinstall Windows. He asked the Answer Line forum where he can find that 20-digit number that tells Microsoft he bought Windows.

To protect its products and software, Microsoft strictly regulates the sale and use of Windows software by embedding a validation code, also called a product key, in every copy of Windows. Should ...