Windows 10 remains one of the most popular operating systems in the world, and a valid product key is essential for installing or upgrading to Windows 10. A windows 10 pro key is a unique 25-character alphanumeric code that Microsoft requires to activate your copy of Windows 10. Here’s what you need to know before purchasing a Windows 10 product key. Why You Need a Windows 10 Product Key A Windows 10 product key is critical for activating your Windows 10. Without activation, your system will be limited, lacking features such as customization options and showing constant activation reminders. Moreover, unactivated versions of Windows are not eligible for crucial security…