I had a problem with my laptop which is certain key on my keyboard is not functioning. The weird is, it happened without a reason. because after I shutdown doing my work when I turn it on again, I discovered my "s", "d", "g", "h", "\", "m", " left shift", "caps lock" and "~" key did not work at all. I try taking the key off, cleaning underneath, but nothing seems to be working. After that I try to use usb keyboard and it seems the key can be entered. So I thought my hardware is the problem. than I replace into the new one, but still having the same problem. I already waste my money buying new keyboard. Does any one happen to know what sort of problem this is and how I would go about fixing it? Is it related to the registry. My laptop is Acer aspire 4740G, ram 4GB, processor i3 2.4GHz. I hope someone can help me to solve this problem.