How to make exefile from batfile or vice versa

# Open Dos
# Type "assoc .ext=fileTypei.e you want to conver .bat file to .exe
Eg: type c:\>assoc .bat=exefile
# Here you convert the bat file to exe file.

NOTE: I have written this command in c: so all the .bat file of c drive will be converted in exe file. This command is not useful for single file. You can write this command in notepad and save it as .bat here is your new virus.