Not sure if this is a Vista thing or a Dell thing but the computer (Insperon 1545) will not charge the battery when plugged into the pwr adapter. When booting there is a message that says the wrong adapter is attached and to use the correct one. Also in the tray when I mouse over the battery icon it says "Plugged in, not charging". I have tried a second pwr cord without success. I have read forums suggesting that Dell uses a 3 wire cord and that the middle pin is there to tell the computer what adapter is attached. The computer runs fine when plugged in to the adapter it just will not share with the battery. I am trying to make the computer ignore the "incompatibility" and allow the battery to charge. Any suggestions?