how to exclude files from search windows in xp ?

As far as I know Windows XP does supports arguments like “AND, OR, …” Using “xyz.pdf OR abc.xls OR def.txt” should give you the results you want.

Otherwise you may want to use Windows Search.

     Follow these steps:

1. In the taskbar, click the Windows Explorer button .

2. In the navigation pane (the left pane), click the library that you want to remove folders from.

3. In the library pane (above the file list), next to Includes, click Locations.

4. In the dialog box that appears, click the folder you want to remove, click Remove, and then click OK.

 For more information on how to include or exclude folders, logon to:

http://windows.microsoft.com/en-us/windows7/Include-folders-in-a-library

     You can also refer the below mentioned link

http://windows.microsoft.com/en-US/windows7/Add-items-to-the-Windows-Media-Player-Library

http://social.answers.microsoft.com/Forums/en-US/GettingReadyforWindows7/thread/67ac2992-e76e-408a-90a8-0fa173885a6e

Via a Windows Update or standalone install.