[qwerta]

Windows source code was available for a long time. My university had access to Win 2000 and some latter versions. Nobody was interested since most kernel hackers used BSD and later Linux.

[Someone]

Was? https://www.microsoft.com/en-us/sharedsource/default.aspx (some strings attached)

[bananas]

This is true. It leaked from Mainsoft a few years back. Was great fun reading through the NT4 and 2k source. It has also been useful for working out what the hell goes on inside Win32 on occasion.

[SixSigma]

While there was a leak, the source code was available to industry partners and educational institutions legitimately.

[ballard]

Yup. I had the beta source of win 2k when it was refered to as NT 5.

[yuhong]

I wonder what is the current status of Win2000 custom support.