Follow the below steps to activate Windows 8 with a Windows 8 serial key: To unlock the premium features of Windows 8 OS, it is utmost essential to activate the product. How to activate Windows 8 with a Windows 8 serial key? However, if your purchase is not legal and you had downloaded and installed the copy of Windows 8 OS from a pirated source, you can make use of the Windows 8 activation key to validate your product for free. There are several softwares available online which assists you in retrieving the lost serial keys. You should have also received the same activation key on your registered e-mail. Typically, you can find the activation key on the DVD/CD purchase box of Windows 8 OS. It is almost unlikely to activate a genuine copy of Windows OS without a working product key, but for other pirated version of Windows OS, there are tricks and ways mentioned in this post to activate Windows 8 for free. What is a Windows 8 product key?Īny Windows 8 product key is usually a 25-character serial code that the company uses to validate its product and the user’s purchase. All such keys are secure to use and are 100% working. Now, even the user looking for a free upgrade to Windows 8 OS can activate the program using the free Windows 8 key mentioned in this post.