What "Toolbar" in Windows XP are you referring to?
Internet Explorer?, ... Windows Explorer?,... Notepad?,... ...or, perhaps
you mean the "Taskbar" at the very bottom of the Windows XP desktop?,...
The latter is called the Quick Launch ToolBar, and is [re] activated by
"right-clicking" on an *empty* area of the taskbar at the base of your
desktop, and choosing :
"Toolbars" > "Quick Launch"
hope this is of some help...
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Cheers, Tim Meddick, Peckham, London.