User Manual LG 32MN530P-B 31.5'' Full Hd Ips Monitor

Although some devices may have ports for both HDMI and USB connections, the technologies do not typically serve the same function. However, consumers can connect an HDMI adapter to their computer's USB port in order to transfer audio and visual data, such as a movie or television show, to their television.

Yes, that's something you can do to all monitors - through the OS software. If you are asking can it be mounted that way? Not with the included stand - it does not raise up and down. That would require either a 3rd party stand or a wall mount.

It does not have speakers. It does have blinking green lines and discoloration after it goes dark and then comes back on. The discoloration can't be eliminated by changing wires or anything else connected to the monitor. You have to turn it off and wait for it to fix itself. So, that it has, but no speakers.

Yes, the brightness is adjustable. Although I don’t know your definition of “way down”, brightness can be reduced relatively dramatically for a viewing in a dark room. Additionally, there are two reader modes which reduce blue light, in effect making the monitor dimmer as well

It comes with a disk with software that will install an icon on your screen for monitor settings (e.g. brightness , split screen etc)

Likely depends on the security settings on your computers. So it could be a few different things. If you're in a domain, ask IT. If not, try right-clicking the app and select "Run as Administrator", then select "yes" at the UAC prompt. At worst, turn your UAC off, reboot, then run the app "as Administrator". Make sure you go back and turn on your UAC and reboot.