Backup your data first or install Windows on a spare drive (or buy a new one and keep your current drive. 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. So I just bought TDU2 for Steam and when I want to start it the message below appears. A possible reason for this is that. An error occurred while verifying your product license. Clean install Windows 10, not upgrade. The hardware of your system could not be identified. When I click retry a couple of times the message. . tdu2 unlock code.