I followed all the steps correctyly, and now succesfully upgraded my OS

great thanks to Ayil for the help and his fast server..

I did encounter several problems during installation, but that was because I don't delete the vendor.xml file
If you're using windows 7, need to go to c/program files (x86)/common files.... (to find the vendor.xml)
that's where I figured my mistake

thanks sifoo