D7 is a free and powerful tool for managing and controlling the operating system and all the components installed in the computer. In addition, the program is ideal for accurate diagnostics of the entire computer, as well as for repair and optimization of Windows. D7 has a huge number of useful functions and tools, allowing, among other things, a thorough testing of the performance of the entire computer and its individual components, as well as collecting the most important information about the operating system and all the applications installed in it, and so on.

The program is particularly helpful in detecting and removing the most dangerous viruses, worms and other malicious software, as well as finding and fixing errors in the operating system and in devices connected to the computer. For example, it checks the amount of free and used hard disk space and detects if the operating system has all the latest updates and patches. In addition, it analyses all network services and devices installed on your computer.

D7 also has a number of useful tools to clean the hard drive of unnecessary, unused files, as well as special modules to clean up temporary directories and remnants of web browsing - caches, cookies, browsing history or annoying toolbars (toolbar). The program also offers the possibility of downloading external applications supporting the optimization and repair of the system and the entire computer. These include CCleaner, CrystalDiskInfo and Defraggler.