I personally would get the correct one for ya laptop. Ya laptop isnt exactly cheap, and ya might be slowly damaging it with a power supply that isnt specifically designed for it
see, that kinda stuff happens when you have windows. Don't even try to tell me that the fact that it exploded just after you got vista installed was coincidence.
it could of been pulling to much power out of that cable and the weakest point in the cable could of turned red hot and melted the whole thing, could be anything haha