To manage or limit data usage during Windows updates, set your connection as metered or use 'Delivery Optimization'. This tells Windows to limit the amount of data used on this connection, which can be particularly useful for connections with data caps. While this can help reduce data usage, be aware that some updates may not be downloaded automatically when using 'metered' connections, potentially leaving your system vulnerable to security risks. Regularly check for and manually initiate important updates to ensure your system stays secure.