Version Build Number Released on KB Article
RTM 4.0.7333.3 12/19/2007
Rollup 1 4.0.7333.1113 11/24/2008
Rollup 2 4.0.7333.1312 or  4.0.7333.1316 1/15/2009, 2/8/2009
Rollup 3 4.0.7333.1408 3/12/2009
Rollup 4 4.0.7333.1551 5/7/2009
Rollup 5 4.0.7333.1644 or  4.0.7333.1645 7/2/2009
Rollup 6 4.0.7333.1750 9/27/2009
Rollup 7 4.0.7333.2138 10/22/2009
Rollup 8 4.0.7333.2542 12/17/2009
Rollup 9 4.0.7333.2644 02/11/2010
Rollup 10 4.0.7333.2741 04/08/2010
Rollup 11 4.0.7333.2861 or  4.0.7333.2862 06/03/2010
Rollup 12 4.0.7333.2935 08/02/2010
Rollup 13 4.0.7333.3018 09/23/2010
Rollup 14 4.0.7333.3135 11/18/2010
Rollup 15 4.0.7333.3231 01/13/2011
Rollup 16 4.0.7333.3335 03/10/2011
Rollup 17 4.0.7333.3414 05/05/2011
Rollup 18 4.0.7333.3531 06/30/2011
Rollup 19 4.0.7333.3628 09/25/2011
Rollup 20 4.0.7333.3732 11/10/2011  2550098
Rollup 21 4.0.7333.3822 02/07/2012  2621054