Unfortunately as I thought I had enough experience, I didnt backup any HP safety partition and I just backuped my important data.
About the BIOS, theres not much to do right now, as I cant access to any Operating System! the HD is now empty and I checked on the BIOS about SATA or AHCI and nothing similar.
I didnt try the RAM though. it has 3GB, can be a problem? I think its something more about the HD but I dont know how to make the proper adjustements!
about the DVDs yes, I burnt them myself and I already tried with other versions from friends as well that worked, and always similar problems!
thanks for your fast reply
cant wait to your answer!