Introduction: Freezing Lots of Computers at Once

Picture of Freezing Lots of Computers at Once

If you have ever wanted to freeze all of the computers in a network (such as at work or school), here is your chance. This can be a hilarious prank, but be aware that some people might get upset when their computers are all frozen. (Be careful! If you don't have permission or ownership, charges can be filed against you. This prank is technically classified as a Denial of Service attack. I will not be responsible for anything you do with this information.)

This mass freezing will work by having one or more "host" computers send hundreds of thousands of pop-up messages to everyone in the network. Every time you try to click on something, more pop-ups have gotten in the way, soon freezing the computer. When all of the computers are shut off and rebooted, it starts all over!
Have fun!

Step 1: Write the Script

Picture of Write the Script

First we will write the netsend script. This will send a message to all of the computers on the network. You can either do batch or VBS on this, but batch is more intimidating. Here is the code that you need, and remember to save it as anything.bat (the part before .bat can be whatever you want). :

@echo off
net send * messagehere
goto start

What this will do is send a pop-up message to all of the computers in your network, and then loop back and do it again. It will go as fast as possible, taking up all of the CPU usage. That way, no one could stop the program (as that takes up CPU) without turning off the machine. As all of the network's computers are going ballistic with pop-ups, no one will know which one is causing it (especially if you launch this from two computers in the network, as they would both be causes but look like victims).

Step 2: Place the File

Picture of Place the File

Now what we are going to do is place the batch file in the start up folder of one or more of the computers in a network. If you want the mayhem to continue after all of the computers are rebooted (see step 4), follow this step. If you want your prank to be short lived, skip this step. I suggest you follow this step, as it greatly improves the ingeniousness of it all.

Go to the control panel and look at the icon that says "Programs". Under it should be some links, one saying "Change Startup Programs". Click on that one. From there it should be pretty self explanatory. Just add the file to the list.

Step 3: Preparing to Deploy

Picture of Preparing to Deploy

This will work only if the computers being used (including the victims) have net send enabled. This is easy, but remember that you need Windows XP computers for the prank to work. You might already have net send enabled, in which case this step can be skipped. You may want to check, however (see the bottom of this step).

Keeping that in mind, we will open up Run on one of the computers. You can do this by either hitting both the Windows key (the key with the Windows logo on it) and the "R" key, or by going under "Accessories" in "All Programs" in the Start Menu. When the Run bar comes up, type in "services.msc". (Of course, without the quotation marks.) Hit enter. A new menu should come up with a list. The list is in alphabetical order, making navigation easy. Find where it says "Messenger". Right click it and select "Properties". Where it says "Startup Type", put "Automatic". Exit out.

Repeat this for all the computers. You'll get fast at it with practice.
To check if a computer already has net send enabled, open the Command Prompt. It can be opened either by typing "cmd" into Run, or by clicking on it in "Accessories". Now type "net send /?" (again, without the quotation marks). If it responds with information about the command, then it is already enabled. If it responds by saying that "net send is not a command", than net send is not yet enabled.

Step 4: Deploying the Freeze

Picture of Deploying the Freeze

When you are all ready, open the file that you had created earlier. For maximum freezing, open it on more than one computer.

Watch as everyone's computer starts swarming with pop-ups. Soon the tech department will be called, but the only thing to do will be to shut off the computers. This would normally stop it, since shutting off the computers would mean shutting off the program, but because we put it in the startup folder, it will start all over when the right computer is turned on. It is a brilliant prank, as the problem computer(s) could be one of many identical computers. Again, have fun!


porterzhunter (author)2017-06-20

my computer doesnt have the change startup programs on my control panel

what should i do

TheAngelGamer2 (author)2017-04-03

I have a computer from a school I went to if I use it on them what is the chance of them tracing it to me.

I have me own acc on it and everything now

jas330 (author)2010-11-13

whats the chance of getting caught like having it traced back to your computor

greenbean (author)jas3302010-11-13

   There is a 99.999...% chance of this being traced back to your computer's IP. The real question is whether the computer you use can be tracked back to you. If you are on a public network, then the chance is slim. If you're using a school computer, and are logged in under your name, then there is little chance of you getting away.
   It depends therefore on if the computer is traceable to you, and if so, how competent security is in your situation.

JerrodN (author)greenbean2017-02-04

My lunch period is free, so I go to the library and use their computers. The librarians love me and think I'm an angel. They never suspected I did this.

PridhviM (author)greenbean2016-12-10

I know this thread's pretty old. Another thing is that even if you use a guest account, if they have any brains, they would just use the security cameras to see who was using the computer. If there are no cameras, then they can just ask the people who were sitting near you if they remember who was sitting there.

catataphisher (author)greenbean2014-04-18

what if you do this on a school network through a personal computer

hintss (author)greenbean2010-12-01

terrible here. They wouldn't let me switch the keyboard layout to dvorak even when I asked nicely

P0513D0N (author)jas3302016-02-18

well, if they see you

Samuelogan987 (author)2017-01-11

Try this;
(Opens up file explore forever)
goto "Hi"

Save as .bat file and run!!

RyanS12 (author)2015-04-19

It keeps giving information on the command, not opening popups

PridhviM (author)RyanS122016-12-10

That means that you're not using the command correctly. Please post your input

OllyC1 (author)PridhviM2016-12-14

@ echo off


netsend * Hi Lol

goto start

GlitteringToothpaste. (author)2015-10-30

Would a MAC spoof allow you to go undetected using this method?

Depends on network. Some will reject the connection. Even if it works, they can ban the mac address, use a dhcp (and thereby ban the ip), or just ban the name of the pc outright. There are many ways to get caught. Just don't do it.

will421 (author)2010-12-04

At my school they let us bring USB drives and plug them in.
My first thought of what to put on the drive was an autorun file and a VBS or Batch file. ;)

AlexK125 (author)will4212016-05-16

will421 that is a great idea, thank you! I am going to take one of my stupid flash drives tht only have half a GIG and i will add an Autorun file in there with some crappy viruses! I am even going to make some really creepy cirus that will ask the user questions and if answered incorrect it deletes an important file or spam opens itself or opens everything on the desktop!

how about that we think of something that will make every1 I know freak out??

AlexK125 Cool idea dude, it is handsome and so are ya!

AlexK125 (author)AlexK1252016-05-16

Sorry for those spelling errors, i try to be professional :P

P0513D0N (author)will4212016-02-18

same. i have a ton of self made "viruses" that i keep on one. my first one was basically a degraded version of this that requires you to manually open the bat was like this.

@echo off


start notepad.exe

goto top

TheBoyUnionGaming (author)2016-06-17


cn130899 (author)2016-05-19

Is there a way to do this on windows 7 or later versions

0patinchooo (author)2015-10-02

I just need to know that you're 100 percent sure They can't know who caused it.
Thanks for the post though, I needed it to make the school library a bit more fun

AlexK125 (author)0patinchooo2016-05-16

There is definatly NOT a 100% chance you won't get caught, if the tech room is smart they will know how to trace it! Just scroll up a but and find my comment then you can read up on how to avoid getting caught!

-___- (author)2016-04-02

How do i stop the virus on my computer if i am the host and am connected to the network

AlexK125 (author)-___-2016-05-16

You could Hard Shutdown the computer. Or do you mean that you want it to stop while it does it to everyone else? If that is the case you cannot not stop it on your PC otherwise it would stop for everyone else. It makes it better anyways because people see it happening to you and so they don't suspect its you!

-___- (author)2016-04-02

This is unrelated but still in the field

can i enable autorun on a windows seven computer

AlexK125 (author)-___-2016-05-16

If you want this to Autorun you have to get into the Startup Folder, Click the start button and start typing "Startup" it would find a folder nammed startup, just drag the file into that folder and then when the xomputer is powered on and someone logs in it will automatically launch that file and nobody will know why for the longest time until the tech department figures it out.

AlexK125 (author)2016-05-16

Hey There People Of The Internet! I got some info for this topic :)

1. There is a service that was enabled in older computers (up to XP) and it is what allowed the messenger to work. Although this may not automatically be enabled when you get a personal PC/Laptop it may work at the school since they enable services that would allow them to do certain things with the School Computers.

2. There is a small chance that you could get caught...most school computers have a guest account though so log into that and don't login to anything that would help them figure out its you.

3. There is a way to set this up with Task Scheduler but its pretty tricky to do so since you need Administrative Permissions

4. If you get caught you could get introuble for freezing the computers unless you say this "I was downloading an .MP3 File and a window opened and said i need to download the better quality file and it downloaded a file and when opened it freezed my PC" when i get home i will even make a quick website that does that and it fakes an .MP3 so you guys have evidence...

Anyway, your welcome for this information. Make sure to email me or add me on skype for further information


Skype: EnderBoy898

See ya!

LIAMQ798 (author)2015-12-21

LOL!! killed da school computers

P0513D0N (author)LIAMQ7982016-02-18

you actually did it? i put it on a thumbdrive and am saving it for blackmail

flyincircles (author)2016-02-09

Combine this with task scheduler to nuke networks from multiple computers at the same time and frame people! *insert evil face here*

RyanS12 (author)2015-04-19

The "Messenger" isn't coming up for me in there, please help.

Michael Faraday (author)2015-01-22

Hey.... Can you tell me if you can net send from windows XP to windows 8 or 7?

amaan.asim (author)2015-01-10

Hi, I want to know that after I have injected to all the computer than how am I going to delete this virus???

A.C.E. (author)2011-01-12

is there a way you can do something like this, but instead of just sending a msgbox you can send another batch file? like... send this batch file to every other computer so not only does it get the boxes, but if you turn it off and then back on it becomes a host again? if they forgot to shut one of they would have to do it all over again hahaha and there are other files i could send that this method would help with too ;)

BaTcH MasTeR 101 (author)A.C.E.2014-03-01

Its possible but not with net send command

greenbean (author)A.C.E.2011-05-25

It sounds like youre asking how to make a remote computer run your commands. That its moving from a funny prank towards malicious code. And, that would be difficult, as the whole point of firewalls is to stop that process. people do it, but not with batch, and not as begginers.

Orelldo (author)2011-05-29

Hey, is it possible to add a picture file to the messages that get spammed?

BaTcH MasTeR 101 (author)Orelldo2014-03-01

It is possible but its a lot easyier to track

BaTcH MasTeR 101 (author)2014-03-01

yes there is

Super_Nerd (author)2011-06-04

Is there a way to do this with Visual Basic Script?

greenbean (author)Super_Nerd2011-11-27

Yes. Either one can do this. The syntax is slightly different, though.

Super_Nerd (author)greenbean2011-11-28

Do you know how to?

tyler9613 (author)2009-11-09

Thanks for enlightening one of our students minds with this! He did this on a network of around 200 computers, and we couldn't even find the computer that started it!

LOL, but it was pretty funny seeing everyone freaking out that their computers wouldn't work. But we had to do a whole network reboot because it created a lot of overhead network interference.

We have since stopped and removed the messenger service from all our computers :)

greenbean (author)tyler96132009-11-10

You are very welcome! That is exactly what I want to hear: someone using it. I'm especially glad that it worked as planned. I have to admit that I never tested this myself.

aspangmac (author)greenbean2010-03-03

 Is there any way to send this in an email.  so when the user opens the email and clicks a link it will run and possibly auto create as a startup program if so could you tell me how

RedFlash (author)aspangmac2010-03-13

Sorry mate, but sending batch files is illegal. You could try this in VB Script though

RedFlash (author)RedFlash2010-03-13

As VB runs invisible and it can do more than batch files

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