What? Google did not have an answer? Amazing.
Are you sure you are referring to a "laptop generation" and not a "processor generation"?
There have been seven generations of Intel Core processors, as well as other many other processors.
Scroll down this page a bit to see the Intel processor families and generations: Intel® Processors
So, it depends, if related to the [Intel] processor, what processor your laptop has.
This link, although for Windows 10, does provide a few frequently asked questions and does provide a list of "recent" processors that are supported. Anything older than these processors is unsupported:
Provide your processor model number and perhaps we can help you more.