Short after this issue started popping up, I published a second guide to help users get through the installation, but this involved some online search to hunt down the “Windows 8.1 generic key”, serial number that would only let you continue, but after the installation you had to update your system with the Windows 8 retail product key you paid for. Now, I found another interesting trick that is documented by Microsoft and it will allow you bypass the product key screen and clean install Windows 8.1 using the ISO without the Windows 8 product key. After the installation and during the Out Of the Box Experience (OOBE), you’ll be prompted again you enter a key and only here is when your Windows 8 key will work, however you can skip this step and do it later. Let’s dive into the step-by-step instructions.

How to do a clean install of Windows 8.1

That’s all! Now try to clean install the OS one more time. This method will basically allow you to install Windows 8.1 Pro or Core edition as a trial for about 30 days without entering a Windows 8 product key during the installation — because, once again, it won’t work –. But of course you have a valid retail key, so after everything is installed and configured, you can go to PC settings, PC & Devices, PC info, and here you can change and activate your product key. All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.