If your game client is not starting correctly, there are multiple issues that may cause this behavior.
First make sure that your computer meets the requirements to play the game. The requirements can be viewed here. If you do not meet the requirements listed (64-bit Operating System, 3 GB+ of Memory, etc.) the game will not start correctly.
Outdated or incorrect/corrupted video and/or sound card drivers
Make sure you have the most up-to-date video and sound drivers available for your system. Often you can find these by checking your system manufacturer's website and visiting the driver update page for your system model. You can also download updated drivers directly from your video or sound card manufacturer if you know what type of card it is. AMD and Nvidia also offer "automatic driver" installations if you know you have an AMD or Nvidia card but do not know what the model is.
Running the game with incorrect Windows permissions
If Windows is not allowing Steam or Shadow or Mordor to start or install software correctly, it can also cause problems when launching the game. Try closing the game and Steam entirely and then right-clicking your Steam shortcut and selecting "Run as Administrator". Launch the game via your Game Library in Steam to test.
Running the game with incorrect software permissions
Other programs on your computer can also prevent the game from running or installing correctly. Often, security software (anti-virus/firewall software) can be blocking the game accidentally. You can add exceptions for Steam and Shadow of Mordor (ShadowOfMordor.exe) to prevent these types of programs from impacting the game.
Malware can also interfere with the game so running an updated anti-virus/anti-malware scan would be a good idea to attempt to resolve any possible infections that are causing problems with the game.
Another option to help with a possible background software conflict is a "Clean-boot" of Windows. This starts up only essential Windows processes so it's a great way to determine if another program or process is causing your problem with the game. A good guide to perform this can be found here. Note: If you use a touch screen monitor it is not recommended that you perform a clean-boot, as processes required to use your touch screen may not start with Windows.
Corrupted or incorrect DirectX installation
Try updating Direct X by installing the most recent version available. This is the software the game uses to communicate with your PC, so if the installation is out-of-date or corrupt it can cause crashing.
Overclocking or Turbo Boosting a processor/GPU
If you are Overclocking or Turbo Boosting a component in your computer, we strongly recommend resetting the component or components to chipset manufacturer specifications, as doing so may prevent any crashes from occurring.
If you’re using ‘Intel Turbo Booster’, please disable this feature, which is found in your Computer Bios settings.
Corrupted installation of the game
You may have a corrupted installation of the game client. Try uninstalling and reinstalling the game client.
To do this in Steam visit your Game Library, right-click "Middle-earth: Shadow of Mordor" and select "Delete Local Content". You can then reinstall the game by visiting the page for it in your Game Library and selecting Install.
If you have tried the steps above and the game is still not starting correctly, please contact Customer Support using the Ask for Help link above.