If you are receiving the error "Launch Error: Easy Anti-Cheat is not installed" when attempting to run Sea of Thieves through Steam, please complete the following steps to resolve the issue:
1) Open up Steam, right click "Sea of Thieves" and choose "Properties…"
2) Go to the "Installed Files" tab and click "Verify integrity of game files"
3) This process can take 5-10 mins. Once complete, you can then launch the game
If the issue persists
EasyAntiCheat can be installed manually by the following method:
1) Open up Steam, right click "Sea of Thieves", go to "Manage" then "Browse local files". This should open up an explorer window
2) Locate the file named "InstallEasyAntiCheat" (.bat, if you have file extensions visible) and run it.
3) Attempt to load the game again.