[OatmealDome]

Judging by the branding and build string, this is actually an early version of Windows XP! "Whistler" was the codename for the Windows XP project.

[runjake]

Yep.[1]

And earlier builds had the way cooler Watercolor theme[2] (IMHO) than the final Fisher-Price-looking theme.

1. https://simple.wikipedia.org/wiki/Windows_Whistler

2. https://betawiki.net/wiki/Watercolor

[mananaysiempre]

The story of that theme seems strange to me. On one hand, Raymond Chen says[1] it was a decoy in order to avoid leaking in-development Luna outside Microsoft. On the other, Microsoft’s own Office XP and VS .NET (before 2005) have styling that fits Watercolor better than it does Luna. I don’t know how to reconcile these facts.

[1] http://bytepointer.com/resources/old_new_thing/20060111_016_...

[causi]

Why do Windows 10/11 windows look like such garbage compared to this? Now window borders are invisible and the title bar is just one single color instead of that nice fade.

[chungy]

Windows 2000 was build 2195, 2210 is only 15 days later. It's reasonable that branding was switched to Whistler pretty early, working on the next version, but this build is still extremely close to just being a plain Windows 2000.