Just right-click the Taskbar, select Properties, select the Notification Area tab, and check the box next to Sound before clicking OK.
Also keep in mind it may just be hidden due to a lack of use...click the arrow to the left of the Notification Area to expand it and show all icons present.
Hope this helps,
i lost windows vista primiun sound icon (speaker icon) can you help me
to restore the icon. always thank you.