You don’t need a third-party app, just the icon files to replace the defaults. If you’re theming your desktop, it won’t feel complete until the taskbar meshes with the rest of the look.

If an app icon appears on my desktop—ZAP! Gone. I now even hide my taskbar so that nothing greets me but a pristine wallpaper ...

Then from the ‘Taskbar Properties’ window select ‘Customize’. Next, select which Icons and notifications should appear on your taskbar and hit the ‘OK’ button. If this does not solve ...