Some users may face Portal 2 error: "Failed to load the Launcher DLL" when they try to load Portal 2 game. If you are the one of those users, you are at the right place to troubleshoot the error.
Here are given the tips to fix this error:
Delete the Bin Folder
Reinstall the Game
Resolve Registry Issues
Reinstall DirectX and Microsoft Visual C++ Redistributable
Provide Security Permissions to the CSC Folder
Delete the Bin Folder
Corrupted contents of the Bin folder of Portal 2 game could lead Portal 2 error: "Failed to load the Launcher DLL". Delete that folder to solve your problem.
Exit the game and Steam application.
Open any of the following directory which founds:
C:\Program Files\Steam\SteamApps\\Portal 2
C:\Program Files\Steam\SteamApps\Portal 2
Delete the sub folder called Bin.
Reinstall the Game
Portal 2 error: "Failed to load the Launcher DLL" can be solved by just reinstalling the game. Do these steps to perform the procedure:
Press Ctrl + Alt + Delete.
Click Processes and end the Portal 2 process. Confirm the action when prompted.
Click Start | Control Panel.
Click Programs | Uninstall a Program.
Select Portal 2 from the list of installed programs and click Uninstall.
Follow the on screen wizard and restart the computer when you are done.
Download a fresh setup and re-run it to install Portal 2 on your computer.
Resolve Registry Issues
Problems in the Portal 2 registry paths could lead to error: "Failed to load the Launcher DLL". Using a Registry Cleaner software, scan Windows registry and repair the problems detected.
Reinstall DirectX and Microsoft Visual C++ Re-distributable
Portal 2 requires DirectX and Microsoft Visual C++ Re-distributable to be installed on your computer for running it properly. If the installation of these packages are corrupted, you may face Portal 2 error: "Failed to load the Launcher DLL".
Visit Microsoft website and download fresh setup for both these tools. Run the downloaded files and follow the on screen instructions. Reboot the machine when you are done.
Provide Security Permissions to the CSC Folder
Lack of security permissions to the CSC folder could result in this error. Provide the appropriate security permissions by following the steps provided below:
Open My Computer.
Double click to open the following directory:
C:\Windows
Right click the sub folder called "CSC" and select Properties.
Click Security tab and then Edit button.
Provide the appropriate read, write and access permissions.
Click OK | OK.
