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This is the Windows XP version of my earlier instructable "The Annoying Windows Vista and 7 Prank".  This version has been tested on XP, and in theory it should work on earlier versions of Windows as well.

I will be using a .vbs file to display three messages a certain number of times when the computer starts.  The first message is "Happy April Fools!  You've been pranked!".  The next one says "I bet I can be very annoying!".  The last one says "Guess what?  You have to put up with these messages (however many more times based on whatever you set) more times."

Once it is done, it will tell the person you pranked how to remove it.

Step 1: Create the File

First you will need to open up notepad.  Find it by clicking start and typing "notepad".  Next you will need to copy and paste the following text into notepad:

dim com
dim number
dim filesys
set filesys = CreateObject("Scripting.FileSystemObject")
dim try
try=1
dim firstrunbyte
firstrunbyte=0

'If you want to change how many times the person has to view the message boxes, then change the number below.
com = 20
'If you want to change how many times the person has to view the message boxes, then change the number above.

firstruncheck()

sub firstruncheck()
if filesys.fileexists ("C:\Documents and Settings\All Users\Start Menu\Programs\Startup\April Fools.vbs") = false then firstrun()
if (filesys.fileexists ("C:\Documents and Settings\All Users\Start Menu\Programs\Startup\April Fools.vbs") = true) and (firstrunbyte=0) then prank()
end sub

sub prank()
msgbox ("Happy April Fools!  You've been pranked!")
msgbox ("I bet I can be very annoying!")
number=com-1
number = cstr(number)
com = (com - 1)
if com = 0 then del()

if com > 0 then
msgbox ("Guess what? You have to put up with these messages " + number + " more times.")
prank()
end if

end sub

sub del()
msgbox ("I guess I have to tell you how to stop this from ever bothering you again. Click OK, and I will open a folder.  Delete the file that says April Fools.")
run "C:\Documents and Settings\All Users\Start Menu\Programs\Startup"
end sub

Sub Run(ByVal sFile)
Dim shell
    Set shell = CreateObject("WScript.Shell")
    shell.Run Chr(34) & sFile & Chr(34), 1, false
    Set shell = Nothing
End Sub

sub firstrun()
msgbox("OK, I see that you need to get me ready.  I will open up the folder you need to put me in, please copy me in.  After that, please tell me you are ready so I can check and make sure everything is set.")
run "C:\Documents and Settings\All Users\Start Menu\Programs\Startup"
msgbox("Click OK when you are done copying me.")
if filesys.fileexists ("C:\Documents and Settings\All Users\Start Menu\Programs\Startup\April Fools.vbs") = true then
msgbox("It worked!  The computer is now ready.  Shut it down.")
firstrunbyte=1
end if

if (filesys.fileexists ("C:\Documents and Settings\All Users\Start Menu\Programs\Startup\April Fools.vbs") = false) and (try < 3) then
msgbox("Opps... something went wrong.  Let's try again.")
try = (try + 1)
firstrun()
end if

if (filesys.fileexists ("C:\Documents and Settings\All Users\Start Menu\Programs\Startup\April Fools.vbs") = false) and (try = 3) then
msgbox("Sorry, for some reason this just isn't working.  Go back and read the instructions again, if that doesn't help, please leave a comment.")
end if

end sub

Step 2: Save the File

Now you will need to save the file as "April Fools.vbs".  In notepad, click "File", then click "Save As", point the file browser to wherever you want to save the file to, change the "Save as type" to "All Files", and type April Fools.vbs as the file name.

If you don't want to make the file yourself, you can download it from here:
http://www.filehosting.org/file/details/327540/April_Fools.vbs

If you download it, be sure to change the file name from "April_Fools.vbs" to "April Fools.vbs".  (Replace the underscore with a space... the file will not work right if you use an underscore.)

Step 3: Implement the Payload

Now go to your victim's computer and run the file.  It will open a folder where you need to copy it to, after you copy it the program will check to be sure everything is ready, then it will tell you to shutdown the computer.  When the person starts up their computer, it will start the program which will display the messages.  If you want to change how many times the person has to put up with the messages, very close to the top of the file there is a line that says com=20.  Change that 20 to however many times you want.

Good luck and happy pranking!
<p>ilove the prank</p>

About This Instructable

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Bio: I currently work in a climbing wall as my main job, but I am majoring in Computer Internetworking Technologies, with an emphasis on computer forensics ... More »
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