import ctypes
from typing import Dict, Any

async def lock_computer(args: Dict[str, Any]) -> Dict[str, Any]:
    """
    Locks the Windows computer screen using the LockWorkStation API.
    Args:
        args: Dictionary of arguments (not used in this implementation).
    Returns:
        Dictionary with status message and input arguments.
    Raises:
        OSError: If the lock operation fails or the platform is not Windows.
    """
    try:
        # Use Windows API to lock the screen
        result = ctypes.WinDLL('user32.dll').LockWorkStation()
        if not result:
            raise OSError("Failed to lock the Windows screen")
        return {"message": "Windows screen locked successfully", "args": args}
    except Exception as e:
        raise OSError(f"Error while locking the Windows screen: {str(e)}")