DeleteAll

DeleteAll is a command-line utility designed to delete all files from the current directory, and optionally all subdirectories with files. It doesn't include complicated arguments, making it accessible not only to users experienced with console software, but also to beginners.
When attempting to delete a folder containing system-protected files (typically in use at the moment) alongside regular files, Windows may interrupt the task due to these events. This app was created to skip the protected files and continue with the deletion operation without any interruptions.

How it works

After double-clicking the .exe file or calling its process from a Command Prompt window, DeleteAll asks for confirmation to remove all files from its location, in addition to any existing subfolders and their containing files and folders.

Be careful when confirming actions

If you confirm the action by typing "y" (yes), then all files and subfolders are eliminated, leaving only this .exe behind. However, clicking "n" (no) doesn't actually deny this action. Instead, the tool deletes only the files in the root directory, leaving the subfolders and their containing files untouched.

No setup required, besides .NET Framework

The program's packed in a single .exe file that can be dropped anywhere on the disk to delete current folder contents. It's also possible to copy it to a USB flash drive to clean it up. It doesn't create files on the disk or make changes to your system registry. On the other hand, you must have .NET Framework installed, since it was developed with the aid of this platform.

Conclusion

It might be a bit tricky to figure out how it works at first, since the app's not explicit in this regard. DeleteAll removed files and folders quickly and successfully in our tests while remaining light on system resources usage.