Microsoft has issues four new 4k premium themes to Windows 10 users. All the themes feature beautiful nature captures in high resolution.
At Home PREMIUM
Bask in the delight of peaceful moments at home in these 15 premium, 4k images, free for Windows 10 Themes. Download it here:
Amazon Landscapes PREMIUM
Put the waterways and forests of the most diverse region in the world on your desktop in these 20 premium 4k images, free for Windows 10 Themes.
Amazon Wildlife PREMIUM
The Amazon rainforest has more animal species than anywhere else in the world. Take a look at 18 of them in these premium 4k images, free for Windows 10 Themes.
Also, there is a new regular (non-4K) for Windows 10.
Reclaimed by Nature
Spooky or sublime? These 16 images of vehicles and architecture overtaken by nature are free for Windows 10 Themes.
Don't forget to check out the following 4K themepacks collected from Microsoft Store. They are really great:
If you have plenty of themes installed, and no longer need them, you can delete custom themes installed manually or from the Store, all at once. Check out Remove All Installed Themes At Once in Windows 10.
The *.deskthemepack file format
Starting with Windows 7, Microsoft invented a new theme format - themepack. It was created so all the theme resources would be packed inside a single file and sharing of such themes would be easy. In Windows 8, the file format was revised to deskthemepack, and supported specifying if the window color would be automatically set based on the dominant color of the desktop background. Windows 10 supports both themepack and deskthemepack formats. Technically, themepack and deskthemepack are usually ZIP or CAB archives that contain images, and the corresponding *.theme text file with image names packed into a long text block.
Interested users can directly extract images from such files. This can be useful for Windows 7 users, since the OS doesn't support *.deskthemepack files. The alternative solution for Windows 7 is Deskthemepack Installer, the app that allows to install Windows 10 and Windows 8 themes in Windows 7 with one click.