Hide notifications while presenting: When turned on, Windows 10 will prevent notifications from appearing onscreen while you’re giving a PowerPoint presentation.Show alarms, reminders, and incoming VOIP calls on the lock screen: If you’re concerned about privacy, you may want to turn this off, but you may also find it convenient to see your appointment reminders at a glance.Show notifications on the lock screen: This one’s pretty self-explanatory, but if you would rather not have prying eyes see that you’ve received notifications while you were away from your desk, you’ll want to turn this one off.Show app notifications: When turned on, you’ll receive notifications from apps installed on your PC.If you aren’t an experienced Windows user, you may find these useful if you’re more knowledgable, you may find these annoying. Show me tips about Windows: When this is switched on, Windows 10 will occasionally serve up tips and tricks through its notifications feature.Under the Notifications subheading on the same Settings page, you’ll find a handful of general options that you can toggle on and off:

Windows 10 can t open action center