Windows Vista reached END OF LIFE: on 11th April 2017. Windows Vista is longer supported by Microsoft and unlike Windows XP I don't think Vista will be missed by many. However if you are still using Vista then what does this mean for you?
This is what Microsoft has to say:
If you continue to use Windows Vista now that support has ended, your computer will still work but it might become more vulnerable to security risks and viruses. Internet Explorer 9 is no longer supported, so if your Windows Vista PC is connected to the Internet and you use Internet Explorer 9 to surf the web, you might be exposing your PC to additional threats. Also, as more software and hardware manufacturers continue to optimize for more recent versions of Windows, you can expect to encounter more apps and devices that do not work with Windows Vista.
Microsoft has also stopped providing Microsoft Security Essentials for download on Windows Vista. If you already have Microsoft Security Essentials installed, you'll continue to receive antimalware signature updates for a limited time. However, please note that Microsoft Security Essentials (or any other antivirus software) will have limited effectiveness on PCs that do not have the latest security updates. This means that PCs running Windows Vista will not be secure and will still be at risk for virus and malware.
So in simple terms - its time to upgrade or better still replace!