Microsoft has reminded customers that some editions of Windows 10, version 1909 (also known as the November 2019 Update) will reach end of service in May 2021. Microsoft stops providing technical support and fixes for newly discovered issues and security vulnerabilities for all products that reach their end of service.Redmond advises customers still using end of service software to upgrade as soon as possible to the latest on-premise or cloud versions to keep their systems safe from attacks.