From the download page: It is known to run on Windows 95 (IE5), Windows 98 SE, Windows ME, Windows NT4 (SP5), Windows 2000, Windows XP, Windows Vista, Windows

From the download page: It is known to run on Windows 95 (IE5), Windows 98 SE, Windows ME, Windows NT4 (SP5), Windows 2000, Windows XP, Windows Vista, Windows 7, 8 and 8.1. ...it is also known to run on Windows 10 and 11, and likely any newer versions too. IMHO this is a great example of how software should be. One tiny binary that is very widely compatible, doesn't have any user-hostile "features", and remains stable and bug-free. It's a contrast from an industry that largely can't produce such achievements, is becoming increasingly hostile, and quite telling when there are already comments here complaining about its age.