It is possible to disable updates in Windows 10, although it's not a 1-click selection as in 7 and before. If you check the selection under your current network to make it a "Metered Connection" that will stop most updates. To stop them completely you can turn off the Windows Update Service, either manually or with a 3rd-party app to make it more convenient to toggle on and off if necessary. "Win Update Stop" is one example. In versions that let you set group policies (i.e. other than Home) it can also be done there.