The Navigation Pane in Outlook is used to switch between the different areas of Outlook,such as Mail, Calendar, Contacts, Tasks, and Notes., the Navigation Pane displays the folders within the view you are working with. The following folders are commonly used in the Navigation Pane in Outlook:
Inbox
Sent Items
Deleted Items
They are most commonly included in the Favorites.
I would say A. Allowing us to improve efficiency in the workplace has helped grow our economy and we can thank technology for that. Due the it always improving our lives only get that much easier.
You can use the following command Bootrec /rebuildbcd
U Can use an anti virus, or do daily malware scans in ur device