Hi all

Yesterday I verified my sw version on my new, but bought used, X5 and it was 3-1/30.
Ok, I decided to upgrade to V25. Downloaded V25, burn it, after insert cd into the navi, it starts the upgrade.
Suddenly, the system went in crash...display black, cd doesn't come out the navi.
Same when Xp on my pc freeze...doesn't respond at any input.
What happened? What could I do?
Help me please.
Someone say that I could try to disconnect car battery, touch cables from each other for 10 mnts, than reconnect cables to battery and try to upgrade with a V28 cd.
Do you think could works?
Thks all