i have phased three problems with my laptop


1.key board keys are not working properly(may be some dust is going to the inside of laptop via keys so could you please clean the laptop inside once.
2.more sound is coming to inside of laptop when the switch on the laptop. this is main issue.
3.some times battery showing full unfortunately its going to low and showing error low battery level and one more is laptop is suddenly going to shutdown when showing movies and compile c programs.

so please repair my laptop