Updated to Build 770 yesterday and game launches fine but CTD's after the track loads every time (no matter which track or vehicle) tried a fresh install but does not help never had a problem with any previous build.... System specs : mobo - Gigabyte GA-990FXA-UD3 processor - AMD FX8350 octa core memory - 16GB Crucial DDR3 hdd - 120 GB SSD gfx - 2x Zotac Nvidia GTX 660 2GB SLI os - Windows 8.1 64bit also tried removing all 3rd party plugins and loading with zero AI - no dice.... any assistance would be much appreciated (is there any where to download previous build so i can revert back?) EDIT : fixed after following the clean install instructions in your runtime error sticky thread