Windows 7 support will end on January 14, 2020. If you continue to use Windows 7 after support has ended, your PC will still work, but it will become more vulnerable to security risks and viruses because you will no longer receive software updates, including security updates, from Microsoft. Microsoft strongly recommends that you move to a new PC running Windows 10 sometime before January 2020 to avoid a situation where you need service or support that is no longer available. 

“Credit Microsoft Support- https://support.microsoft.com/en-us/help/4467761/windows-what-happens-when-windows-7-support-ends”