Actually, the problem with downloading the latest (12.10.8.5) version of iTunes for Windows 7 is Apple's confusing and misleading download page.
If you go here: https://www.apple.com/itunes/ you'll see a big "Get it from MICROSOFT" button which, as you've discovered, takes you to the Microsoft Store where the only available iTunes is an app that only works for Windows 10.
If you scroll down the page past the image of the laptop and below the line that says " Windows system requirements," you'll see a line that says, "Looking for other versions? macOS > Windows >"
Click on the "Windows" link there and you'll get to a page with the following:
That screenshot was taken on a Windows 7 x64 system; I assume that if you were using 32-bit Windows 7, the big blue button would be for the 32-bit version and the other line would be "Looking for Windows 64-bit?"
The direct download links are:
64-bit iTunes: https://www.apple.com/itunes/download/win64
32-bit iTunes: https://www.apple.com/itunes/download/win32