Windows XP build 2197

Windows XP build 2197 is an unleaked build of Windows XP that was compiled in early 2000. It was mentioned in an IT Pro article from 13 February 2000, where Paul Thurrott claimed that build 2197 was the first internal build of Whistler and that it had gone out internally "weeks ago". A new style for build tags was implemented starting in this build - the lab, compile date, and compile time were added to the end of the build string after the compile number.

The build number is mentioned in several files in the leaked Windows XP source code, including the full build tag, as well as the build tag of a later recompile from 7 January:

A script file possibly related to Windows Update, which was found in the 2022 Microsoft source code leak, also checks whether build number is 2197 or above: