It’s risky to use older operating systems such as Windows XP, because Microsoft no longer offers critical security patches for them to protect you from malicious attacks. Next year it’ll be even more dangerous if you browse using Chrome, as Google is ending support for some older operating systems.

From April 2016, Windows XP and Vista will no longer receive updates and security patches, along with Mac OS X 10.6, 10.7 and 10.8.

Google Chrome was one of the last web browsers to continue to support XP, after Microsoft announced that it would stop sending out security fixes from April 8, 2014.

[Related story: Why are Windows XP users still clinging to the past?]

Marc Pawliger, Google’s director of engineering and early notifier, said that the decision was made because, “these platforms are no longer actively supported by Microsoft and Apple.”

“Starting April 2016, Chrome will continue to function on these platforms but will no longer receive updates and security fixes,” he wrote in a blog post.

“If you are still on one of these unsupported platforms, we encourage you to move to a newer operating system to ensure that you continue to receive the latest Chrome versions and features. Such older platforms are missing critical security updates and have a greater potential to be infected by viruses and malware.”

Despite lack of support, XP is still used by 11.68% of computers according to NetMarketShare – although the number is falling as users start to upgrade their machines.

Vista only has 1.74% of the market share, while Mac OS X 10.6 has 0.45%, 10.7 has 0.37% and 10.8 has 0.35%.

If your PC is running on Vista or XP, it’s important to consider upgrading. Your machine is at greater risk of being infected by viruses or malware. If you’re still using XP, find out why you should upgrade here.

Chrome users can also watch the video above for some time-saving shortcuts.

Are you still using an older operating system? What’s stopped you from upgrading? Share your thoughts in the Comments section below.