When I wrote that the workaround of downloading the Windows 8.1 ISO file from Microsoft was only half the battle, many users reported that they couldn't get past the first screen because Windows 8.1 setup didn't accept the Windows 8 product key on a fresh install.
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Download Windows 8.1 ISO file with Windows 8 retail key step by step
Shortly after this issue first appeared, I published a second guide to help users install, but it required an online search for the "Generic Key for Windows 8.1," a serial number that only allowed you to continue, but after installation required you to update the system with the paid Windows 8 product key.
Now I found another interesting trick documented by Microsoft that allows you to bypass the product key screen and reinstall Windows 8.1 using the ISO file without the Windows 8 product key. After installation and during the Out Of the Box Experience (OOBE), you will be asked to enter a key again and only then will your Windows 8 key work. However, you can skip this step and do it later.
Let’s dive into the step-by-step guide.
