You should try turning off the Windows Defender protection on your PC to make sure there is no antivirus software is blocking the game files from running properly. Whereas if you’re using an AMD processor, turn it off and reboot the game to apply changes. Make sure to disable the multi-threaded rendering option from the game menu to try resolving the issue. It seems that the in-game video settings menu in the Rainbow Six Siege title has a multi-threaded rendering option enabled, somehow conflicting with the game crashing quite often.

Once done, reboot the game to save changes.

Go to ‘Selected Rendering Device’ > Select your dedicated GPU.

Open the Steam client and then launch the Rainbow Six Siege game > Go to the Video Settings menu from the game.

Make sure to select the correct rendering device from the game settings menu that you can find below.

Restart the Rainbow Six Siege game after applying changes.

Just head over to Settings > Video > Set ‘Enable DX12’ to ‘Off’.

As the DirectX 12 version is the latest one available for Windows, it may be possible that somehow your PC configuration isn’t capable to run it.

You can try turning it off if you’re using DirectX 12 on the PC. Finally, try launching the game again to check for the issue.Open the user settings file using any text editor > Set ‘FullscreenMode=1’ to ‘FullscreenMode=0’ to save changes.Under the WindowsNoEditor folder, you’ll find a file called ‘GameUserSettings’.Open the mentioned folder and go to the Saved > Config > WindowsNoEditor directory.Go to the %LOCALAPPDATA% folder > Search for the ‘Prospect’ folder.Click on the Windows icon to open the Start Menu > Type %LOCALAPPDATA% on the search bar and open it.If in case, the game seems to crash a lot then you can try setting up the Display Mode to Windowed from Full Screen.

Finally, you should try launching the game again to check for the issue.

Set ‘OVERRIDE FOR Rainbow Six Siege’ to ‘Disable Steam Input’.

Right-click on Rainbow Six Siege > Click on Controller.

Launch the Steam client > Go to Library.

Rainbow six siege launcher download