Solved! Asus- when I turn on black screen with saying:

[Travis Becton]

Insert bootable disk, and how can I get a copy or a recovery disk if I don't have my product key bc my laptop won't boot up properly. Also im tring to recover my hard drive.

 

[webworkings]

You can try downloading the correct product from here (assuming you are using Windows 10)... https://www.microsoft.com/en-us/software-download/windows10

If you are using a different version of Windows then you likely would need the key.

You other option is to contact the laptops manufacturer and purchase the needed installation CD/DVD/USB from them.