A simple and effective Virus Trick don't try this at home :D.
Well I will really not be responsible for any kind of damage this is just for educational purpose as we all know :-P.
|Opening text document or notepad|
|command in text document|
|save as any where in drive|
|save it as '.bat' format|
Remember this is very effective do not double click on this it will delete all of your system 32 folder's files. In other words this will delete your window. Windows will not work after Restarting P.C.