[mappu]

NT 4 and Windows 2000 source code were leaked on Feb 12 2004.

The second google result is a copy that Microsoft are hosting on their own website: https://github.com/lianthony/NT4.0

[Dalewyn]

In that case, parent commenter or someone sufficiently motivated should cite file and line number to corroborate the claim.

(I'm not going to do it because I'm drunk and I probably have better things to do than illicitly look through Microsoft source code.)

[atombender]

Someone else already posted a comment with the exact file.