Firstly make sure that your anti-virus software is not blocking the RRRE(64).exe process from running. You might want to add it to the exceptions. Also try disabling Windows firewall and run the game to see if it's the cause. Verify your game cache from Steam: in games library, make a right click on RaceRoom -> Properties -> Local files -> Verify game cache. If you happen to have a crash dump file, you could also join it in this thread.
Try to launch the game's .exe file as administrator to see if it helps. Also, this user had similar problem with another game: https://steamcommunity.com/app/223750/discussions/0/1474222595312395821/ I'm very inclined to think that this is anti-virus related.
Then you have to add the whole path to RaceRoom in Comodo as an exclusion. Please read here on how to proceed: https://help.comodo.com/topic-72-1-451-4758-.html The two paths you have to add are: Disk (C or D) \ Program Files (or x86) \ Steam. And also: C:\Users\%USERNAME%\Documents\My Games\SimBin. That way you will add the whole Steam folder as an exception with all games inside, and also RaceRoom files with your settings.
Hola a todos, tengo este problema después de la ultima actualización. El juego no arranca. Gracias de antemano