Oldest GUI application that still runs on Windows 11

What's the oldest Windows GUI application you can still run on Windows 11 today, without any modifications? For now, the best answer Boris Popik can come up with is an innocuous application from build 347 of Windows NT 3.1, an early prerelease: CDPLAYER.EXE. You can't go any older than that, because earlier prerelease builds had not yet finalised its PE format and calling convention. Neat find.

Popik also mentions a few other contenders, but I won't spoil those here.