laptop keys stops working

Hi, Your laptop keyboard may have accumulated a lot of debris over years of use that it interferes with the micro switches under the keys, thus they are unable to execute the command as you type. I suspect a more sinister symptom but I hope I am wrong, that your laptop keyboard may have reached its end-of-life service. Some keyboards are only capable of a few million strokes and upon reaching this magic number, just quit without warning. Being a laptop, it can command a higher repair cost to replace the keyboard, almost equivalent to buying a new one. I suggest, you buy a regular USB-connected PC keyboard and use it on your laptop. You can also use a regular PC mouse too, which is much better than scratching on the pad.