Windows 10 Notification with PowerShell
From WickyWiki
This script allows you to show a notification in the Windows 10 Notification area on the bottom left of the screen.
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
$objNotifyIcon = New-Object System.Windows.Forms.NotifyIcon
$objNotifyIcon.Icon = [System.Drawing.SystemIcons]::Information
$objNotifyIcon.BalloonTipIcon = "Info"
$objNotifyIcon.BalloonTipTitle = "Some title"
$objNotifyIcon.BalloonTipText = "YOUR MESSAGE HERE"
$objNotifyIcon.Visible = $True
$objNotifyIcon.ShowBalloonTip(10000)
Start-Sleep 500
Source: