When launching the game I get a "Failed to initialize BattlEye Service: Driver Load Error (577)." error.
Due to new driver signing requirements Windows systems now need to support SHA-2 signatures to be able to load the BE driver. If you get this error on Windows 7 please make sure the system is fully up-to-date or install the following update specifically: https://support.microsoft.com/en-us/topic/sha-2-code-signing-support-update-for-windows-server-2008-r2-windows-7-and-windows-server-2008-september-23-2019-84a8aad5-d8d9-2d5c-6d78-34f9aa5f8339.
This answer is copied from BE's FAQ and slightly adapted to be Unturned-specific. Click here to visit the BE support page.