Bought 3 of these for my kids school, only last 1 to 2yrs before problems start. The units will just stopped working. No power. 2nd time in a yr. Only use the laptops 1hr a day for homes schooling only. No other uses. the unit should not go bad after only 5hrs of use a week. Who will address this situation? Warranty is expired. Not fair companies are allowed to sell sub par products. i need a replacement free of charge and hassles. My Amazon account proved how many of these units I bought.