Windows 7 has one significant change from Windows XP and Vista, it is new “dock style” taskbar. A lot of user's who had recently installed new operating system may want to use classic taskbar. The below instructions shows how to change default Windows 7 taksbar to Xp style.
1. Right-click on any open area of the taskbar and choose Properties from the menu.

2. Choose “Never combine”, which will make every window show up as a separate button on the taskbar, or you could choose “Combine when taskbar is full”, which does just like it says.

3. Now you should see the buttons show up with text labels.

4. In case if you need to delete "pinned" items from taskbar, just right click on it and choose “Unpin this program from taskbar”.

If you want to use classic Windows XP taskbar, simply change “Windows Classic” theme under the Desktop \ Personalize section.