It is officially announced by the company Microsoft, that they will end the support for windows 7 in January 2020. It means that you have only one year left to consider moving to windows 8 or windows 10. Mainstream support for windows 7 were ended back in January 2015, but extended support, whereby Microsoft continues to provide the updates and fixes any issues in the OS.
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It means that if any problem occurred in windows 7, than their will not be any support for it, so you will continue to use the windows 7 at your own risk. If we talk about business than, they can negotiate for extended support to continue, but they have to pay extra for the privilege.