There are several potential workarounds to this issue. Please work through the following steps to see if they fix the problem:

🛠 Update your display drivers.
If you are playing on old or outdated display drivers, you may encounter issues when trying to launch and play any game. You can check what video card and drivers you are running using the DxDiag command. Once you know what hardware you’re using, you can download the appropriate drivers from the web:

• Nvidia Video Card Drivers: https://www.nvidia.com/content/drivers/drivers.asp
• ATI Video Card Drivers: https://support.amd.com/us/gpudownload/Pages/index.aspx
• Intel Drivers: https://www.intel.com/p/en_US/support/graphics
• Laptop video drivers are dependent on and obtained from your laptop’s manufacturer.

🛠 Check your antivirus settings.
Some antivirus programs may prevent the game from launching. Check your antivirus settings to make sure Age of Empires II: Definitive Edition is not being blocked.

• Add the game to any whitelist feature in your antivirus program. (Note: some antivirus programs may remove the game from the whitelist when it is updated. Double check that the game is still on your whitelist!)

Here are a few particular antivirus programs with known conflicts, as well as resolution steps for each:

• Avast: Age of Empires II: Definitive Edition must be added to the program’s whitelist. Steps can be found here.
• AVG: Age of Empires II: Definitive Edition must be added to the program’s whitelist. Steps can be found here.
• Bitdefender: Age of Empires II: Definitive Edition must be added to the program’s whitelist. Steps can be found here.
• Comodo: disable shellcode injection detection.
• F-secure: Age of Empires II: Definitive Edition must be added to the program’s whitelist.
• Trend Micro: Age of Empires II: Definitive Edition must be added to the program’s whitelist. Steps can be found here.

If the antivirus requires you to target the game files through “Browse…”, the default file path will be:

• Steam: Program Files (x86) > Steam > steamapps > common > AoE2DE > AoE2DE_s.exe
• Windows Store: Program Files > WindowsApps > Microsoft.MSPhoenix_101.101.######.0_x64__8wekyb3d8bbwe > Game > AoE2DE.exe

🛠 Manually update Microsoft Visual C++ Redistributables and restart your machine.
Make sure you have all the necessary files to run the game. You can find the latest visual studio files here.

• If you are using a 64-bit Operating System, download the vc_redist.x64.exe file.
• If you are using a 32-bit Operating System, download the vc_redist.x86.exe file.

🛠 STEAM: Verify the integrity of the game files.
Follow the steps to  verify the integrity of your game files. Once this is done, re-launch the game and verify that the issue is fixed.

🛠 Remove mods and add them again one at a time.
Some mods may not run well with the game after a new update. Removing all of the mods and then adding them again one at a time will help to identify if any are causing an issue.