All of the sudden I am having trouble with my laptop charging. As of right now it will only charge to 37%. The battery icon says 'Plugged in, Charging" , however it doesn't go any higher. When I first connect the adapter the battery bar moves up and down a few times, then stays still. The LED light is lit up on the charger as well as on my laptop. I had installed a bunch of windows 7 updates before noticing this problem. Could it be some sort of software issue? Any help or ideas would be greatly appreciated! Thanks