Why? In the late 90s, Microsoft was fractured. The consumer team (working on the DOS-based 9x kernel) was racing to integrate the web, while the business team (working on the NT kernel) was chasing stability. A "Windows 99" would have required a major feature set that simply didn't exist. Instead, Microsoft poured resources into what became Windows 2000 and the ill-fated Windows Neptune (a consumer NT project that was canceled and folded into XP).

But one build of Neptune leaked: . The "About Windows" dialog in this build refers to the operating system as "Windows Neptune (Beta)" with a build date of December 1999. If you squint, that is technically a Windows operating system from 1999. However, it is not called "99," and it runs the NT kernel—meaning many DOS games would not work on it.

The replies are usually a mix of sarcasm ("Just download more RAM while you're at it") and genuine confusion. But every so often, someone claims they’ve seen it. They describe a boot screen with a strange teal hue, a start menu that doesn’t quite look like Windows 98, and a build number that doesn't appear in any Microsoft archive.

So, the next time you see a Reddit post asking for the ISO, send them a link to the Windows 98 SE boot disk. Tell them to change the system properties logo. And whisper: The ghost is just a reskin.