Microsoft has ended technical support and security updates for older versions of its Internet Explorer browser.
The changes, which will affect versions 8, 9 and 10 of the browser, were announced in August 2014.
Some estimate that these older browsers account for more than 20% of web traffic while Computerworld claims that only 55% of IE users are using the latest version.
Browsers are often targeted by hackers and experts predict a crop of attacks.
"Beginning January 12, 2016, only the most current version of Internet Explorer available for a supported operating system will receive technical support and security updates," the software giant announced on its website.
"Microsoft encourages customers to upgrade and stay up-to-date on the latest browser for a faster, more secure browsing experience."
It is continuing to support IE 11 and Edge, which is the default browser for Windows 10.
http://www.bbc.co.uk/news/technology-35291938