In severe cases, you may need to uninstall Wallpaper Engine and manually delete the wallpaper_engine directory and then reinstall the app once your antivirus app has been configured to be less strict.
You can get the latest graphics card drivers from all big vendors here: Some drivers offer a "Perform clean re-installation" option in the advanced section, be sure to enable that option to automatically clean any remnants of broken drivers. That means you need to first uninstall your drivers and then re-install the latest drivers after your current drivers have been fully uninstalled. If you are unsure what is crashing Wallpaper Engine, please do a clean re-installation of your graphics card drivers. # Wallpaper Engine Crash Quick Fix Attempt