An error occurred while verifying your product license. Idk then maybe u have older version or smth cuz when I had some problem's downloading different one was enaugh, but if it's newest one. When I click retry a couple of times the message. Backup your data first or install Windows on a spare drive (or buy a new one and keep your current drive. A possible reason for this is that. . The hardware of your system could not be identified. Clean install Windows 10, not upgrade. tdu2 unlock code. So I just bought TDU2 for Steam and when I want to start it the message below appears.