I can't boot the game as it seems that there is a problem in the config file and I can't change it, nor can I backup game files because it says RaceRoom Experience cannot be backed up until it has finished updating. The game is fully updated.
Might be caused by your Steam install in Program Files, windows get's a bit panicky about anything in that folder, try running Steam and Raceroom in administrator mode and/or moving your steam install into a c:\Games\ folder or similar.
Are you running the game/Steam in administrator mode and have to tried moving the install out of \Program Files\? Gonna need more info Vilas.