https://bugs.winehq.org/show_bug.cgi?id=48959
--- Comment #5 from Hans Leidekker hans@meelstraat.net --- (In reply to Zebediah Figura from comment #4)
The answer is that MSI doesn't; the installer (or more accurately, the framework it uses) sets VersionNT64 manually. But it only does that if we actually report 603—which we weren't—and then it depends on some registry keys we don't currently set to retrieve the real version. I've sent some patches.
Is this fixed by 658183a803fced017e1e29f4001cec8b48748327?