The End of Support Calendar shows Microsoft Operating Systems end of support dates, whether they are the end of mainstream support that updates features and cosmetic changes, or extended support, which ends security fixes and all Microsoft technical support other than old web pages.
All Windows 8 systems should be upgraded to Windows 8.1, and nearly all such computers have the system requirements to run Windows 10.
End of extended support refers to the date when Microsoft no longer provides automatic fixes, updates, or online technical assistance. Without Microsoft support, you will no longer receive security updates that can help protect your PC from harmful viruses, spyware, and other malicious software that can steal your personal information.
The web browser, Google Chrome, will continue to function on Windows XP, Windows Vista, as well as Mac OS X 10.6, 10.7, and 10.8. However as of April 2016 Google will no longer provide support with updates and security fixes as these platforms are no longer actively supported by Microsoft and Apple. These older platforms are no longer receiving their own critical security updates and face a greater potential to be infected with viruses and malware.
If you are still using these platforms, it is highly recommended that you move to a newer operating system to ensure that you continue to receive the latest Chrome versions and features as well as the Microsoft/Apple necessary security updates. Keep in mind, Windows Vista will be receiving security patches until April of 2017, however Google will not be providing security patches for the entire year before Vista's end of support date.
If you are still running SQL Server 2005 after April 12, 2016, you will no longer receive security updates. Now is the time to upgrade to SQL Server 2014 and Azure SQL Database to achieve breakthrough performance, maintain security and compliance, and optimize your data platform infrastructure.