SgtMe 46 Veteran Poster Featured Poster

I have recently purchased ToCA Race Driver 3 for my PC. I used systemrequirementslab.com to check that it would work, and the only issue that came up was that Windows 7 was not released at the time and it was not officialy compatible. I found this website and I followed the instructions, and the game worked perfectly:

http://www.gog.com/en/forum/toca_race_driver_3/unable_to_start_on_on_windows_7/_/1

(THE SECOND BIT AFTER THE DLL IS ON THE SECOND PAGE! IT IS THE FIXED EXE BIT!)

I can install and run the game perfectly. However, Windows says that it can't use one of the drivers and has to remove it because it has no digital signature (StarForce, I think).

When I boot my computer up, Windows says that it could not start correctly, and that it is searching for a solution or something. It finds a solution and says that it is fixing it. Then, I have to restart my computer, and everything is fine. But ToCA 3 has been "uninstalled". I put it in qoutes because it's not complete removal. The icon has gone from my desktop and I'm pretty sure that there's no registry value any more.

I am running Windows 7 Home Premium 64-bit.

Can anyone please help me?
Thanks very much for your time.