problem unzipping a file Windows XP

[mekanik]

Hi Guys
I am having a problem trying to unpack a compressed file for uploading to a satellite receiver (new image).
I downloaded the software but when i unzipp it it shows as a VLC media file and it obviously is not.
Assuming there is an error on the PC, i downloaded the file from the website to another PC unzipped it and the file type is correct, stuck it on USB drive, returned it to the other computer but when i opened the file it was showing it as a VLC media file.
Can't risk flashing this to the satellite receiver as any problems will leave me not being able to connect the receiver to the PC for a second attempt. I am fairly confident this is just a setting issue but i have not got a clue how to sort it.
Both computers are Windows XP.
Any help would be greatly appreciated.
Regards
Mike