To remove Windows Search version 4 from XP, try the following steps:

  1. Start by running up Add & Remove Programs from the control panel and look for Windows Desktop Search in the list. Unlike with version 3, Windows Search v4 should be there.
  2. If not, open a cmd window (click on Start, then “Run” and type cmd in the Run dialogue that then appears). Then copy and paste the following line into the cmd window:
    %systemroot%\$NtUninstallKB940157$\spuninst\spuninst.exe
  3. If that also fails and you get a “The system cannot find the path specified.” error, then you can download a copy from here. To determine where to extract it to, copy and paste the following line into the cmd window:
    echo %systemroot%
    Note: the location it points to (it is likely to be C:\Windows). Open the zip file, and extract the $NtUninstallKB940157$to this location. Now repeat step 2.

Content Source = http://www.davidarno.org/2008/08/22/how-to-remove-windows-desktop-search-…-revisited/