As you may know, Windows 7 is way past it's prime - no more update from Microsoft. If you failed to take advantage of the Windows 10 free upgrade, how about considering a Linux install. It's free and it's a great operating system. I've tried many, but think that Linux Mint is the way to go. Remember however, it is not Windows, so if you have a Windows program you just can't live without, there may be some bumps.
Take a look at this article -https://www.zdnet.com/article/why-and-how-to-replace-windows-7-with-linux-mint/