Installed vista and Win 7 duel mode in different partition C and D and it works perfectly but today after i re.start my PC i see Vista is not activated anymore(27 days left)I use mainly win 7 but i keep Vista as main OS in C partition.Im using Vista loader 2.0 (Dell) from long time and never had such a problem before.i activated Vista after i finished win 7 installation and activation. Any advice .......