Zorin OS 15 Lite, our lightweight operating system for old and low-spec computers.

With Zorin OS 15 Lite, we’ve condensed the full Zorin OS experience into a streamlined operating system, designed to run fast on computers as old as 15 years. With version 15, we’ve gone the extra mile to make the XFCE 4.14-based desktop feel familiar and user-friendly to new users, especially those moving away from Windows 7 leading up to the end of its support in January 2020. By pairing the most advanced and efficient software with a user-friendly experience, we’ve made it possible for anyone to extend the lifespan of their computers for years to come.

https://zoringroup.com/blog/2019/11/...old-computers/

Is Zorin the most windows-like linux?

That would be debatable. They're selling point is a "Windows Like" desktop. It's all a matter of personal interpretation, to some people it looks very close to Windows, to others it's not even close.

I tinkered with the regular Zorin, it was too close to Windows 10 for my tastes, including the slow login and an overall resource hogging OS. The Lite version might be just fine. And the Regular version might be prefect for you. Just live boot and see