Needless to say, they're all free and can be used by everyone with no limitation, but it's important to know that “redistribution, alteration, or commercial use, of the desktop images is prohibited,” as Microsoft mentioned in an announcement when it released the wallpapers. Microsoft now wants to give something back to the community of users who downloaded and installed Windows 10 Technical Preview, so the company is making available a brand new wallpaper pack with Windows Insider Program branding.

The Windows Insider Program, which was released together with Windows 10 Technical Preview, is already successful according to Microsoft's own stats, as more than 1 million people registered for an account when this program was released.