Windows XP build 2600

Build 2600 is the Release to Manufacturing build of Windows XP, released on 2001-08-24. PC manufacturers could sell PCs with XP pre-installed on 2001-09-24 The RTM build went to General Availability on 2001-10-25 with two main versions: Home Edition and Professional. It had kernel version 5.1 (2000 is 5.0 and Neptune is 5.50)