Warp2search post: As we reported two days earlier, with the english patch already available, MS offers an important patch for Windows XP, that fixes a memory allocation problem with SP1 and the speed of programs loading in Windows XP. The patch was entitled: Programs Run Slower After You Install Windows XP SP-1. Download - Q815411:
Q815411_WXP_SP2_x86_ENU.exe
Q815411_WXP_SP2_x86_DEU.exe

Source : Warp2search