Microsoft has released another new theme "Ireland Theme" for Windows 7.The English version of Windows 7 contains five themes: Australia, Canada, South Africa, the UK, and the US. Depending on what English region you chose during the installation of the operating system, though, only one of these will be visible in the Personalization window; the rest will still be installed, but they’ll be hidden by default.How To Open Hidden Windows Themes in Windows7.
Download the .themepack file, double-click on it and Windows will automatically install and apply it.
PS: You can also download other official Windows 7 themes, Desktop gadgets and wallpapers from Microsoft using following steps:
1. Right-click on Desktop and select "Personalize". Now click on "Get more themes online" link:
2. It’ll open following webpage in your browser:
Alternatively you can directly open the above URL in your browser.
3. From the above webpage, you can download various free themes, gadgets and wallpapers for Windows 7.