3D Cursor follows Mouse Movement The 3D cursor follows me everywhere and does not let me select any other tool. 

In my scenario, when I use the edit mode, the 3d cursor doesn't let me select the vertices,edges or faces. 

I am beginner and help is appreciated!
Thank you!
As Chaola said, probably you are trying to select the edges with the left-mouse button. To change this preference:


go to File > User Preferences (or use the shortcut Ctrl + Alt + U)
move to Input section
in the left side you can choose what mouse button you want to use to select objects