After January 14, 2020, Microsoft will no longer provide security updates or support for PCs with Windows 7.
You can continue to use Windows 7 after support has ended, your PC will still work, but it may become more vulnerable to security risks and viruses.
Technical assistance and software updates from Windows Update that help protect your PC will no longer be available for the product. Microsoft strongly recommends that you move to Windows 10 sometime before January 2020 to avoid a situation where you need service or support that is no longer available.
The Windows 10 free upgrade offer ended on July 29, 2016. To get Windows 10 you will need to either purchase a new device or, if you have a compatible PC, purchase a full version of the software to upgrade your existing device.
Windows 7 and Office 365
Even though Windows 7 will no longer be supported after January 2020, they will continue to provide you with security updates for Office 365 for the next 3 years, until January 2023.They are doing this to give you additional time to make the transition from running Office 365 on devices running Windows 7 to a supported operating system, such as Windows 10. But, during that time, as long as the device is still running Windows 7, Office 365 won’t receive any new features updates.