Microsoft is no longer going to support Windows 7 from January 14th 2020. If you are still using Windows 7 this article may be of interest. I have also seen somewhere that free upgrades may still be available from Windows 7 to 10. If I locate that again, I will add in in.
Article can be found here: https://www.howtogeek.com/469843/windows-7-dies-today-heres-what-you-need-to-know/