Do you find that getting anything done in Windows 10 takes ages? The Quick Access menu can be found in File Explorer (right-click Start to see the option for File Explorer), and it can help you save a lot of time while navigating the operating system.
For some reason, Windows 10 does not include DVD-playing software by default. Microsoft does sell an app called ‘Windows DVD Player' as a download from the Windows Store, but it costs £11.59 (approximately $15, AU$20).
You can put Cortana on the lock screen for comfort, but doing so could put your Windows 10 device at risk if you leave it unattended in a public place – a passerby could use the digital assistant to peek at your messages or something similar.