How do i change the extension of a file that was sent to me via chat?

my friend sent me a nice program via chat, but he had to change the extension from .exe to .jpg, sop he can send it to me. now it is in my %26quot;archivos recibidos%26quot; (yes, my PC is in spanish, since i live in costa rica), but i dunno how to change the extension of the program from .jpg to .exe again. please help !!!!|||Right click the file and rename it. If you can not see the extension, go to tools/view/folder options in a folder window. Turn off hide extensions for known files. Always set this on afterwards, or an accident can lose or change the extension on a system file this could stop the machine. For future reference, he could have used a dummy extension, say .ddd, and you would then see it anyway.





Additional : if you zip an extension, many mail server filters will see this and block it anyway.|||You need to change your desktop (explorer?) settings to disply the file extensions. Then all you have to do is rename the file from.jpg to .exe.





FYI tell your friend to use .txt instead of .jpg it%26#039;s much more stable.|||You can%26#039;t.





If you must have the .exe program ask him to put it into a .zip format and send it to you and it is probably best to send it by email. If the file is too large, it may not be able to transfer on messenger anyways.





Be forewarned, many viruses and other malware is send using .exe file formats. make sure the program can be trusted absolutely.





Edit - Sorry to disagree Colin but as a JPEG file is an image, it does not contain any executable code unless maliciously installed (such as clicking on the image takes you to a malicious website), and as such can never be an EXE file.