The desktop backgrounds will change every few minutes on its own. Halloween Desktop Themes Download The 10. Simply download the 10.5MB theme pack and select Open to auto-install it to your computer. Windows 7 themes can only be used in Windows 7 Home Premium, Professional, Enterprise or Ultimate editions not Windows 7 Starter Edition for netbooks. A wallpaper or background (also known as a desktop wallpaper, desktop background, desktop picture or desktop image on computers) is a digital image (photo, drawing etc.) used as a decorative background of a graphical user interface on the screen of a computer, mobile communications device or other electronic device. On a computer it is usually for the desktop, while on a mobile phone it. This theme comes with all, 30 full High definition wallpaper for desktop which also doubles up as login screen. In addition it also has a User Account Picture and 4 icons for most used shortcuts on desktop like Computer and Documents. The Halloween Windows 7 Theme also supports Windows 10.