"rm -rf" equivalent for Windows?

I need a way to recursively delete a folder and its children.

Is there a prebuilt tool for this, or do I need to write one?

DEL /S doesn't delete directories.

DELTREE was removed from Windows 2000+

RMDIR or RD if you are using the classic Command Prompt (cmd.exe):

rd /s /q "path"

RMDIR [/S] [/Q] [drive:]path

RD [/S] [/Q] [drive:]path

/S Removes all directories and files in the specified directory in addition to the directory itself. Used to remove a directory tree.

/Q Quiet mode, do not ask if ok to remove a directory tree with /S

If you are using PowerShell you can use Remove-Item (which is aliased to del, erase, rd, ri, rm and rmdir) and takes a -Recurse argument that can be shorted to -r

rd -r "path"

admin:

takeown /r /f folder
cacls folder /c /G "ADMINNAME":F /T
rmdir /s folder

Works for anything including sys files

EDIT: I actually found the best way which also solves file path too long problem as well:

mkdir \empty
robocopy /mir \empty folder