Thanks Darin for your answer.
Well, I did buy it in Multimax Panama (with an Acer veriton M410 computer), I've went already to the store and they said me that Acer does not give the OS in a Disc. They use to give the installation files (in this case Vista Business Spanish) in a partion of the hard drive and we have to burn it in a DVD, but they did not tell me that when I bought the computer, so I removed all the partions including the one where was supposed to be the installation files.
If have bought this license I am wondering how can get the original disc, something I'm sure, it is not in the store where I did buy it because they have said a contundent "no", can you please help me ? I'm very desperate because I have two days that I can not work due this.
I thanks any support.
Anibal.