Official support for Windows 7 is ending. If you didn't get an official Microsoft pop-up, you probably will. You can either upgrade your existing computer to Windows 10 or buy a new computer with Windows 10 already installed.
My recommendation is unless you have a really good computer, it's time to go buy a new one. When the support ends, it will still work, but you won't be protected against security flaws and software bugs. Third party vendors like Intuit, Quicken and Apple may also start requiring you to run Windows 10.