While Microsoft ended mainstream support for Windows 7 on January 13, 2015, meaning that product design, feature updates and complimentary support are no longer being offered, extended support will continue for now and end on January 14, 2020.
During this extended support phase of the Microsoft product lifecycle, security updates for Windows 7 will continue to be released, keeping the operating system safe to use.
Microsoft highly recommends moving over to Windows 10 before the January 14, 2020 end of life date, as security issues discovered with the Windows 7 operating system after that date will no longer be addressed and fixed, making the system more vulnerable to security threats as time passes.
While in some cases it may be possible to install Windows 10 on hardware running Windows 7, it is usually best to upgrade to more up to date hardware along with the operating system, in other words, purchase a new computer.
Please feel free to contact me with any questions or concerns about transitioning from Windows 7 to Windows 10.
~Ted Eiler