After April 11, 2017, Windows Vista customers will no longer receive new security updates, non-security hotfixes, free or paid assisted support options, or online technical content updates from Microsoft.

https://support.microsoft.com/en-us/help/22882/windows-vista-end-of-support

If you continue to use Windows Vista after 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.

Agency Systems recommends Windows 10 Professional or Windows 7 Professional.