I will give some solutions..
Notepad, help not opened??
-> it seems you didn't install genuine operating system
-> first reinstall your operating system
-> then check notepad, hope it will working properly
-> and install some updated antivirus to your laptop which is used to prevent from threats
Keyboard not working??
-> clean the keyboard with the help of air blower
-> after cleaning the keyboard, if suppose you will face the same problem means better you can replace your laptop keypad with the help of hardware experts......