I’m not sure what the context of the question is. Eg: is it a question of general OS support, or is this a specific computer you’re hoping to run this on?
I will offer that Haxe OpenFL runs on Linux, which if you have any control over it, is likely a better option than the now unsupported (by Microsoft) Windows 7.
I’m entirely Linux based on my workstations. I can also cross-compile to Windows targets, so long as I’m using the latest git version of hxcpp and have mingw-w64-gcc installed. No arm twisting here, just relaying what’s possible. I know you use Adobe Animate, which will likely not run (easily) under Linux.
To install the git version of hxcpp (and the principle applies to all Haxe library git repos):
haxelib git hxcpp https://github.com/HaxeFoundation/hxcpp.git