Ok I updated my computer from Xp to vista and with this one whenever plug i my charger it goes dim, and it never used to do that with xp i cant find where to change that, its very annoying and i really need help can someone help me Please....

What model of laptop do you have?
This should be a bios/hardware issue and not Vista.
Look for a couple of keys on your keyboard which have a picture of a sun on them and an up or down arrow on them. It will be in a different color from most of the keys.
You will probably have to hold the function key down and press the one with the up arrow to make it brighter.
Good luck
"sajah"