Help! My laptop keyboard has stopped working properly - it was fine then the next day I turned it on and couldn't enter my password. Most (but not all) keys type the number '6'. I didn't spill anything on it or drop it. I've done a system restore, which didn't work. Does anyone have any ideas to try please? I'm not very tech savvy! It's an Acer Aspire ES15 about 2.5 years old. Thanks if you can help!