Lubuntu 17.04 has reached End of Life, upgrade to 17.10 now! http://lubuntu.me/zesty-eol/
Also have a look at the video made by community member Schyken on our new YouTube channel showing how to upgrade to 17.10: https://www.youtube.com/watch?v=QhdQIzyscGw
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!