I tried everything...from blowing the battery (which worked for my Toshiba), to removing the Microsoft ACPI from the device manager. I even changed the power settings. NOTHING WORKED. I was ready to buy a new battery, until I thought of an old school, nontraditional fix: I put the battery in the freezer. After an hour in the freezer, I reinstalled the battery into my VAIO laptop. It started charging again!