If we knew the make and model of the laptop ...
better advice could be offered as well as the ability to point you to probable links that detail a complete restoration in great detail.
A Dell for instance will have a Service Tag number located on a dataplate on the bottom of the laptop and making use of it on the Dell support site gives you your options.
Just above where you are typing your subject title for each post is this note in attention getting red text --
Note: If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.
Providing that information helps us help you.
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