Windows 7 has a very annoying, yet useless feature: pinning programs to taskbar. If fact, the right-click menu on the taskbar items is so tight that you often click Pin this program to taskbar just accidentally.
There’s no obvious way to disable the feature, though.
If you still want to disable pin to taskbar, download and unzip this, then run Disable_Taskbar_Pinned_Programs.reg . After the reboot, the feature will be gone. To re-enable pin to taskbar, run the other .reg file.