Cannot launch Apex Legends due to EasyAntiCheat error.

my advice to you: just install the latest Windows 10 version 21H2 not older

@graybell1 Here are a few things you can try. Let me know if these work for you:

- Repair your game's files:

- EA App: Go to your game library and click on Apex Legends, then click on "manage", and then "repair".

- Steam: Go to your game library and click on Apex Legends, then click on the gear icon near the right side of the launcher, (below the game's artwork banner). Now, click on "properties", then "installed files", and then lastly, "verify integrity of game files".  

- Epic Games: Go to your game library and click on the 3 dots next to Apex Legends. Click on "manage", and then "verify".

Note: If you don't see this as an option on Epic Games and you have Apex Legends installed through the EA App, follow the steps for the EA App.

- Reinstall the game
 
- Clear Game/Launcher Cache:
 
- EA App
- Steam
- Epic Games

Note: Steam doesn't exactly have a way to clear the game's cache, only a way to clear the download cache, but it might help.

- Repair your system's files:

- Open the Command Prompt in administrator mode

- Type, "DISM /Online /Cleanup-image /Restorehealth" (without the quotes), and wait for it to finish.

Note: DISM stands for "Deployment Image Servicing and Management tool". It often repairs Microsoft related files, such as issues with Window apps. Some problems with the next file checker can only be fixed after running this one first.

- Now type, "sfc /scannow" (without the quotes), and wait for it to finish.

Note: sfc stands for "System File Checker". This one will repair system files, (such as important Windows drivers).

- Lastly, restart your PC.
 
- Other possible fixes for PC players:

- Disabling any programs that may interfere with Apex Legends.

- If you use AMD Software꞉ Adrenalin, try reinstalling it.

- Updating Windows, system drivers, etc.