Cant load any track instead of TopGear also music sounds weird?

I think that its a modded disc or if i downloaded the Launch Track Pack more than 2x or even the Hennessey Venom GT to crash it? If i try Le Mans i wait 53 seconds then it crash.

Is your game installed on the HDD ? if it is, try uninstalling and then reinstalling it. Also try system maintenance on your machine.