Microsoft Windows NT (pre-merge)

Windows NT 3.1
Codename: "NT OS/2"

Nicknames: "Windows Flag", "Classic Windows Flag", "TADA!"

Screen: Same as Windows 3.1's startup, but the rectangle is light gray and the text is carved in the rectangle. "Times" is added next to "Times".

Variants:
 * Beta releases of Windows NT 3.1 contained the text "BETA -" (pretty much the same thing as "PRELIMINARY RELEASE FOR DEVELOPERS"). Following it would be the beta release month and year (OCTOBER 1992, MARCH 1993).
 * Server operating systems contained "Times" below the text.
 * On a beta version of Windows NT Advanced Server 3.5, the logo changed to a white flag with the Windows logo in it.

FX/SFX: None.

Startup Sound (Music/Sounds): Same as Windows 3.1.

Availability: Very rare. Only on computers running on Windows NT 3.1.

Editor's Note: Same as Windows 3.1.

(September 21, 1994-December 31, 2001)
Nicknames: "Windows Flag II", "Classic Windows Flag II", "3D Windows Flag", "TADA! II"

Screen: On a white background, we see the flag logo in CGI. Underneath, in a narrow serif font, is "Times". At the bottom is written, in the same font, "Times".

Variant: On computers running Windows NT 3.51, the background is a shady pale green, and the bottom now says "Times".

FX/SFX: None.

Startup Sound (Music/Sounds): Same as Windows 3.1.

Availability: Very rare. Only on computers running on Windows NT Workstation 3.5 or 3.51.

Editor's Note: Still very basic. The 3D Windows logo looks cool though.

(July 31, 1996-July 11, 2006)
Nicknames: "Windows Flag III", "Classic Windows Flag III", "Nighttime Windows"

Screen: Just the Windows logo with the first panel being red-orange with the text "Microsoft Windows NT Workstation 4.0 with Microsoft Internet Explorer" below it on a starry blue-white gradient background. On the upper-right corner of the screen, we see the text "Copyright 1985-2006 Microsoft Corporation" under the then-current Microsoft logo. Below is the text "The product is protected by US and International copyright laws as described in the About Box.".

Variant: There's a version where without the text "with Microsoft Internet Explorer" and "Embedded" replaces "Workstation". Below is the text "The product is protected by US and International copyright laws as appropriate.".

FX/SFX: None.

Startup Sound (Music/Sounds):
 * Startup: A "soaring" synth/uplifting piano sounder throughout, combined with synth chimes and a flourish at the end.
 * Shutdown: Same as the startup sound, but in reverse.

Availability: Rare. Seen on computers running Windows NT 4.0, which were not a popular operating system from Windows.

Editor's Note: The music suddenly becoming more tense might startle a younger/daydreaming/dark-room situated viewer, but the fact that the shutdown music is the startup music reversed may be considered funny.

Windows NT 5.0 (early beta builds of Windows 2000)
Nicknames: "Windows Flag IV", "Classic Windows Flag IV", "Nighttime Windows II"

Screen: TBA.

FX/SFX: TBA.

Startup Sound (Music/Sounds):
 * Startup: TBA.
 * Shutdown: Same as the last screen.

Availability: Rare. Seen on computers running Windows NT 5.0.

Editor's Note: TBA.