Re: Popup Messages
Presuming you mean the various toasts that Microsoft presents when you do things like plugging in a device or when a Windows Defender scan completes and it wants to tell you what it did/didn't find, etc., the easiest way to review those that have come up that you didn't immediately focus on is to open the Windows 10 Action Center. This can be done using WinKey+A
All of the Windows 10 Keyboard Shortcuts can be found here: https://support.microsoft.com/en-us/help/12445/windows-keyboard-shortcuts
Brian - Windows 10 Home, 64-Bit, Version 1703, Build 15063 (dot level on request - it changes too often to keep in signature)
The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.
~ Niels Bohr