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It's possible that something uninstalled the devices from Windows. You can try connecting an external keyboard and mouse, then check the Device Manager to see if it flags any hardware problems.
Another possibility is that the flat cables connecting the keyboard and touchpad to the main board have come loose. To check the cables you need to remove any screws securing the keyboard and pop off the top edge trim to lift the keyboard up.
On your laptop there should be two identical lugs apart from each other. Just gently prize them out all the way around the keyboard. You'll see a couple of screws securing the the keyboard loosen those and withdraw the old keybord. BE EXTRA careful when disengaging the connection to the laptop. A paper looking connection dont force it out gently ease it and replace it the same way. good luck .. hope you come back here and let me know how you got on most people get what they want and run!!! thats life