I had tried to update my MaxiSys in november and didn't notice till few weeks later that I had lost almost all my manufacuters? I now somehow only have Ford and about 7 others I have I believe are very rare in N.America,so my unit is basically useles,so yes when updating things can go wrong so be carefull as I am very dissapointed now, my unit would not connect since to try updating,so now I just have a expensive basic tablet