Adobe testing
I suspect that Adobe didn't do any testing on Windows 7 (or 2000, or XP, or 3.1, etc.).
I also suspect that the same can be said for any number of applications that install services.
At some point people need to realize that non supported OSs need to be replaced or they need to be paired with non supported versions of applications.
And it's not just Windows; if you're running Linux with a 10 year old kernel, you probably want to upgrade that too.