The exact message is “This Computer will soon stop receiving Google Chrome updates because Windows XP and Windows Vista will no longer be supported”. Well, if you’re using Windows XP, stop it! Now! If you’re using Windows Vista, now is a good time to think about an upgrade or a new computer.
Google’s Chrome blog here states that they’re removing support for Chrome on Windows Vista this April (2016) “since these platforms are no longer actively supported by Microsoft [snip]. Chrome will continue to function [snip] but will no longer receive updates and security fixes. [Snip] We encourage you to move to a newer operating system to ensure that you continue to receive the latest Chrome versions and features.”
Well, that’s not strictly true, Microsoft will issue security patches through Windows Update until April 2017. Google will not be updating the security features of Chrome on Vista from this April. Microsoft haven’t updated the security on their Internet Explorer on Windows Vista either. Maybe you could install and use Firefox from Mozilla as an alternative, but that’s just a temporary fix.
I think Windows Vista and the software running on it will become less secure from now until the end of Microsoft support for Vista in April 2017, after which I would not recommend using Windows Vista for anything financial certainly, for anything important to you, and for anything password-based like email or Facebook as these passwords could be leaked on insecure Vista.
TLDR and the bottom line: For Windows Vista users, over the next year I recommend either upgrading to a new version of Windows, or buying a new computer, and making a gentle transition to the new system rather than waiting until the last minute. I can advise and help with the purchase and the transition.