Version 2.5.1 was released before Windows 11. For Windows 11 activation, consider newer versions like 2.6.4 or higher, which officially support Windows 11.
For Microsoft Office, the traditional standalone model has largely shifted to Microsoft 365. This subscription-based service provides the latest versions of Word, Excel, PowerPoint, and cloud storage across multiple devices for a low monthly or annual fee, eliminating the need for localized product activation entirely. Free and Open-Source Alternatives
