after the warning came up, I said ok, let the computer reboot by itself, in the second run (by itself, the computer) it finished the instalation.
I know some of us get desperate in the first run, I am installing in another computer, so for me it was ok, since while i was surfing for the answer i was able to wait for the computer to finish the process.
so, ket it run and wait, maybe you can get it to work without having to burn another cd