It can be a shock to the system getting used to the new Windows 7 task bar, which is a combination between the traditional Windows task bar, the Mac dock, and the Linux gnome panel. One way to ease the pain is to ungroup the icons in the task bar.
By default, Windows 7′s task bar has large icons that are pinned to it ala the traditional Windows Quick Launch toolbar. It also condenses the traditional task bar buttons that represent running programs into an Icon for each program. It can take a while to get used to this behavior, however, since at first glance it’s hard to determine what is a running program and what is an application shortcut (although there are ways to tell the difference at a glance). It’s also difficult to tell how many program windows are open if you don’t know how.
