Free product key search programs

If you are preparing to reinstall a program or operating system (such as a clean Windows installation), you will need to find the product key (CD key) or serial number before proceeding.
Typically, this product key is on the original installation disk or possibly in your order confirmation email. If you have lost your product key, you can often find it in the Windows Registry but this can be difficult, or sometimes even impossible. Fortunately, there are many free lock search programs available to assist.
Important: Please read our Key Search Program FAQ for more helpful information. This is not an easy topic, especially if you are new to it.
Here are the top 21 free lockups. We also keep a list of commercial key search programs but I recommend that you remove the options below before paying for a program.
1 Advisor to Belarc
Belarc Advisor is standard when it comes to software information systems. I have been using this program for many years. A small aspect of Belarc Advisor is the ability to extract product keys for many software programs, including programs for Windows.

Advantages include displaying information in your browser window, no adware / toolbars to worry about, and other important computer data lists.
Find keys for operating system: Windows 10 pro product key, Windows 8 & 8.1, Windows 7, Windows Vista, Windows Server 2012/2008, Windows XP, Windows 2000, Windows NT, Windows ME, Windows 98 and Windows 95.
Find keys for other software: Microsoft Office 2013 product key, 2010, (plus all previous versions), Microsoft enterprise products, most programs from Adobe, Nero, Corel, and more, as well. Keys for popular video games.
Try Belarc Advisor for your software and Windows search needs before any other program. It is capable of providing you with the best results.
2 Magical Jelly Bean Keyfinder
Magical Jelly Bean Keyfinder is a free utility that retrieves product keys from the registry. It also has the ability to find product keys for Microsoft Office programs, along with product keys from many non-Microsoft programs.
Advantages include very small size, easy to use, quick display of product keys and many options for saving product keys.

Find keys for operating systems: Windows 10, Windows 8, Windows 7, Windows Vista, Windows Server 2003, Windows XP, Windows 2000, Windows ME, Windows 98, and Windows 95.
Find keys for other software: Microsoft Office 2007, Office 2003, Office XP, and some non-Microsoft programs.
The Magical Jelly Bean Keyfinder website says that this free key finder will find your Office 2010 product key but in fact, it does not, at least v2.0.10.13.