As of January 12, 2016, Microsoft will be ending support for Internet Explorer 8, 9, and 10. This means that those browsers will no longer receive security updates, which will make them more vulnerable to hackers. Internet Explorer 11 will be supported well into the future, as it is capable of running legacy modes of the browser back to and including IE5. The MS Edge browser and IE11 are of course both supported in Windows 10, and I suspect that this move is part of Microsoft's plan to migrate existing MS O/S users to Windows 10. If you use reliable third party security software on Windows XP, Vista, 7 or 8.x, then I believe that provided you take reasonable care, use of the older browsers will not get you into trouble. Though if in doubt, download and set as your default browser either, Firefox, Opera or Chrome. There are benefits in doing this, as those modern third party browsers provide support for current CSS features even when operating in older Windows O/S environments. Barry