Windows 10 build 17017 ISO image files are now available for download. The latest Windows 10 Redstone 4 update build comes with new Cortana features and various bug fixes.
Cortana Collections feature can gather things you’re interested in such as items you shop for, restaurants, recipes, movies and TV shows and puts them all into organized lists. In addition, Cortana’s proactive content is going to migrate to Action Center. This frees up Cortana’s user interface to provide tips and other useful stuff.
The latest build also includes a new Startup Settings. Now you can configure startup apps in new Startup page under Settings > Apps. You can see all startup tasks installed for the current user, and enable/disable each of them. In addition, there are various bug fixes and improvements in this build. You can read full build changelog here.