Windows 7 includes hidden Regional Themes that are usually locked based on the location you selected during installation. While most users only see the theme for their own country (e.g., United States), several other high-quality themes—complete with unique high-resolution wallpapers and localized sound schemes—are already stored on your hard drive. InterWorks How to Unlock Hidden Regional Themes
For English-language installations, Microsoft bundled five primary regional themes: Ars Technica Coastal views and Outback landscapes. Snowy peaks and autumnal forests. Great Britain Classic British architecture and countryside. United States Iconic American landmarks and nature. South Africa Unique flora, fauna, and coastal scenes. windows 7 regional themes
Regional themes were popular among: