Windows XP build 2600.1027

Windows XP build 2600.1027 is the earliest known build of SP1 for Windows XP. It is referenced in the file  in the source code for Windows Server 2003.
 * NTLOG INITIATED +DATE+05/04/2002  +TIME+13:13:52
 * NtLog date: Thu Aug 23 18:56:27 2001
 * Exe  date: Sat May 04 12:12:03 2002
 * Processor : Intel CPU, Pentium III (Coppermine core), stepping 3, 256K on-chip cache detected
 * CPUS     : 1
 * System   : Windows NT 5.1[2600], Retail, Hydra Client, Mouse, Service Pack 1, v.1027
 * Build Lab : 2600.xpsp1.020424-1943