January 2020 will be the last time Windows 7 will receive a security update. Customers with a premier support contract can purchase Extended Security Updates (ESU) for Windows 7 Professional and Enterprise through January 2023. Virtualize Windows 7 and narrow the scope of the use of the system so that its only used when absolutely necessary. If there is a need to keep an older operating system, do the best you can to isolate it from the rest of your production network. Then plan on retiring these systems as soon as you can.”]
Source: https://www.csoonline.com/article/3396936/how-to-isolate-a-windows-7-machine-from-your-network.html