Of course one can always disable desktop preview by right clicking on in it and un-checking Peek at Desktop. One can also get a preview of the desktop you can also click Windows + Spacebar keys.
Show Desktop Remover
ShowDesktop Remover is a tiny app that does what its name says – it removes the show desktop button from the Windows 7 taskbar.
Features:
Show Show Desktop will Show the button.Hide Show desktop will Hide the button.Does not require user to have app running all the time and button will not reappear until you want it toHide Show Desktop on System Startup will hide the button and when you boot your system will hide the button then exit.
ShowDesktop Remover v1 has been created by Lee Whitington for The Windows Club. It was created after Lee saw a previous app that was separated into a couple of apps, if a user had Taskbar on Top. Windows 7 users – if you want the Show Desktop button on the left side of your taskbar, the way it appeared in Windows Vista and Windows XP, see this.