If you are trying to play some retro rally racing on your i7 modern PC, this is a problem you’re going to come up against.
Dirt crashes when trying to start the race as it doesn’t play nice with 8 cores!
1. Open the folder where you installed DiRT, then open the “system” folder
2. Edit hardware_settings_restrictions.xml in Notepad
3. Search for the line containing workerMap8Core.xml and change the 8 to 4, i.e. set it to workerMap4Core.xml
4. You may not be able to save the file, if so, right-click it and turn off Read Only