You can continue to use Windows 7, but once support ends, your PC will become more vulnerable to security risks. Windows will operate but you will stop receiving security and feature updates.
Windows 7 can still be installed and activated after support has ended. However, to avoid security risks and viruses, Microsoft recommends that you consider upgrading to Windows 10.
Support for Internet Explorer on Windows 7 devices will be discontinued on 14 January 2020. As a component of Windows operating system, Internet Explorer follows the same support lifecycle.