Beginning January 12, 2016, only the most current version of Internet Explorer available for a supported operating system will receive technical supports and security updates. Internet Explorer 11 is the last version of Internet Explorer, and will continue to receive security updates, compatibility fixes, and technical support on Windows 7, Windows 8.1, and Windows 10. Once Microsoft ends support, clients will no longer be able to reach or maintain PCI Compliance while using a machine running older versions of IE as outlined in the PCI DSS requirements.
You can learn more by clicking the following link to Microsofts website discussing this event at https://www.microsoft.com/en-us/WindowsForBusiness/End-of-IE-support
Potential risks of staying with older versions of IE:
Running IE versions older than 11 in your environment after January 12, 2016 may expose you to potential risks such as
Without critical browser security updates, your PC may become vulnerable to harmful viruses, spyware, and other malicious software which can steal or damage your business data and information.
Businesses that are governed by regulatory obligations such as HIPAA may find that they are no longer able to satisfy compliance requirements. More information on HHS's view on the security requirements for information systems that contain electronic protected health information (e-PHI) can be found here - http://www.hhs.gov/ocr/privacy/hipaa/faq/securityrule/2014.html.
Lack of Independent Software Vendor (ISV) Support:
Businesses that are governed by regulatory obligations such as HIPAA should conduct due diligence to assess whether they are still able to satisfy compliance requirements using unsupported software.