Left 4 Dead 2 Launcher.exe - Unable to Locate Component. An executable file (also called as EXE) is a file which contains a program capable of being executed or run as a. Here contains detailed Left 4 Dead 2 Launcher.exe error fix guide. If not, shut off unnecessary programs (GameBooster might help. Same actions as Step2, and run in compatibility mode. 1) Go to the.exe (C:>ProgramFilesx86>Steam>SteamApps>Common>Left4Dead2>left4dead2.exe) 2) Right click>Properties>Compatibility(Tab)>Check 'Run as administrator" data-type="undefined" target="_blank">Apply/OK 3) After you tick the 'Run as Administrator' box, apply the settings and run the game through Steam (don't click on the.exe itself)! I always have L4D2 run through admin and it works just fine for me. I have no idea why, but try running the game as administrator.