But the process works fine for any Windows 7/8.x product keys, including unused retail keys. “Allowing this now makes no sense since the free upgrade period has ended,” I wrote. That said, I do expect Microsoft to take away this capability eventually.
“So I assume this will no longer be the case at some point, though I just tested this with the final Anniversary Update release and it worked just fine.” I tested it again this morning, multiple times, and in different ways, and it always worked. And I believe the reason that this still works is for customer convenience.
If you're uncomfortable making registry changes in order to change your Windows XP product key, using the popular free product key finder program called Winkeyfinder is another option.
It's an excellent alternative solution to changing the Windows XP product key code manually. Try my Step by Step Guide to Changing the Windows XP Product Key for an easy walkthrough!
If you install this build of the Windows 10 Insider Preview on a PC and it doesnt automatically activate, you can enter the product key from Windows 7, Windows 8 or Windows 8.1 used to activate the prior Windows version on the same device to activate Windows 10 by going to Settings Activation and selecting Change Product Key.
If you do a clean install of Windows 10 by booting off the media, you can also enter the product key from prior Windows versions on qualifying devices during setup.
While I think it's less common these days, many people still use product key generators or other illegal tools to get product keys that work to install Windows only to find out later, when they try to activate Windows, that their original plan isn't going to work out. You can change the product key manually by making certain registry changes or by using a wizard available in Control Panel. Since some versions of Windows use slightly different names for some menus and windows, pay close attention to the differences that are called out in those steps.Yes, Microsoft has been communicating the July 29 end date on the free upgrade for months.And yes, we’ve known that the Anniversary Update would arrive on August 2 for a while now.What happens is that you’re secretly assigned a new product key for your new operating system, and you need to find it before you initiate a clean Windows 10 install. Before you start, we’d like to make it perfectly clear that this isn’t going to help you get a pirated copy of Windows 10.This is simply a way to help you find a product key that you’ve legally obtained. It’s exceptionally popular and it lets you find the activation key for over 1000 different programs, including a Windows installation. Depending on the version of Windows 10 you have installed, you will see the product key listed next to its name (see screenshot below) when you run it.