A:AnswerYou can tilt the display to an angle between -5 degrees to 25 degrees. See the full description with diagrams at:
http://dlcdnet.asus.com/pub/ASUS/DigitalHome/DAV/ET2321I/XX09_ET2321I_E8388_v10.pdf
Page 17.
A:AnswerYes, it comes with Windows Defender, and I was told just today that I should use Windows Defender plus free copies of Malwarebytes and CCleaner rather than another program. It also comes with a month-long trial of McAfee.
A:AnswerIt can be wall mounted if it has a metal bracket screw at the back, most of the product of ASUS that are newly manufactured can be wall mounted