DEL

Deletes the files you specify.

Note: DEL cannot delete a directory tree. To delete a 
directory tree, use DELTREE (in MS-DOS/Windows 9x/Me) or RD (in Windows 
NT/2000) command instead. DEL command cannot delete a file with 
read-only, hidden or system attribute. To delete such files, you should 
use ATTRIB command to change the attributes of the file first. For more 
information on ATTRIB, please refer to my document "ATTRIB.EXE" in the 
section "MS-DOS Basic Knowledge (for Beginners)".

For more information, please refer to MS-DOS Help or Windows NT 
command line command help.