A Windows 11 Key Viewer is a useful tool for anyone who needs to retrieve and manage their Windows 11 product key. With its ability to easily extract and display the product key, users can troubleshoot activation issues, upgrade to a new computer or motherboard, and transfer their Windows 11 license. When choosing a Windows 11 Key Viewer, look for tools with a user-friendly interface, support for various Windows 11 versions and architectures, and the ability to access the Windows Registry.