Matt dropped his laptop. Now he gets a blue screen of death and a 'hard drive damaged' message. How does he get his Windows 10 installation back if he installs a new hard drive? Leo says as long as Windows was authenticated, Windows 10 is tied to the computer. Once Matt installs a new hard drive on his computer, he can download the Microsoft Windows 10 ISO and then activate it. He should create a recovery media on a thumb drive as a safe backup. He should also check his laptop's firmware, as there may be a way to read the serial number if it's an HP.