Some creators on sites like DeviantArt password-protect their files to prevent re-uploading.
Packing wallpapers serves as a basic form of Digital Rights Management (DRM). It ensures that complex "Scene" wallpapers—which include scripts, particles, and sounds—stay bundled together as intended by the creator. For those looking to edit them, using the internal is the only supported way to "open" the package without breaking the animation logic.
: Restarting Windows Explorer via Task Manager is a high-success "soft fix" that releases locked file handles.
Wallpapers categorized as "Applications" (scripts or programs) are usually compiled, meaning the source code is inaccessible and cannot be opened for editing. How to Bypass the Limitation