BTW. Windows (codename) Neptune wasn't actually released to public at all.
Also the beta of Windows 95 was called Chicago, also the screens are available (just as normal as Win95, but with some different apps and more 3.x style), and even the download (!).
Vista was nicknamed as Windows Longhorn as in 2002, and also it was released as beta, also you can download it for free or see the screens. It seems just like Windows XP with an more fancey color scheme. No 3D environment I think.

I do not like over-active pretty-colour amazingly-smooth 3D operating systems though
Downloading it may be a copyright infringement, but if you want just to try it how it worked, I see no problem.
Also abandonware (3.1x, Win95, 98, old beta versions of OSs) should be declared as free!
Zacariaz wrote:well i knew it was most likely 2k or maybe ME, but ive never heard of the third option

How Windows 2000 and XP got the stability? From NT kernel I suppose

Or the DOS subsystem as Win98 did?

WinNT 4.0 is just Win95 without DOS (WinNT 3.1 and 3.51 are looking JUST as Win 3.1x, but this time, its an *full* 32-bit OS!), along NT kernel is more stable, more bugfixes, (almost) no BSOD. In Win9x BSOD can be just a little error, in WinNT (or its successors, 2000 and XP), it is a serious system failure.

Windows ME is something between W98 and W2000, the worst edition of Windows ever seen. Unstable, buggy, no quality OS.

Vista = Windows XP + Windows 9x/ME + 3D environment + colourish huge-@$$ desktop
Regards
inflater