Microsoft products will reach their end of support during 2020, with Office 2010, Visual Studio 2010, Windows 7, Windows 2008 (including 2008R2), and multiple Windows 10 versions including 1803 and 1903 being some of the most important ones. Microsoft stops providing bug fixes for issues that are discovered, security fixes for newly found vulnerabilities, or technical support. Customers advised by Redmond to upgrade as soon as possible to the latest on-premise or cloud version to keep their systems secure and bug-free.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-products-reaching-end-of-life-in-2020/