Windows XP can cause the taskbar icons for applications opened with the same program to be grouped together. If you open a Word document, an Excel spread sheet, another Word document, Notepad, and another Word document, grouping similar taskbar buttons would show the 3 Word icons together, instead of the default order, the sequence of opening the applications. To group similar taskbar icons:
1. Right-click the Taskbar and press Properties.
2. Select the Taskbar tab.
3. Check the Group similar taskbar buttons box.
4. Press Apply and OK.