But if you have pinned some system folders like Computer, Recycle Bin, Control Panel, etc, you may not get the option to Unpin the program from the Start Menu.

Unpin system folders from the Windows 7 Start Menu

To unpin such un-removable programs and folder shortcuts, open regedit and navigate to the following key:

In the right-side pane, delete Favorites. Restart your Windows computer. The Start Menu will be reset to default.

How to unpin or remove programs from Windows 7 Start Menu - 69