Pressing CTRL + ALT + Delete on a Apple Mac

On my Mac I use a Windows 10 VM (Parallels Desktop) to access my work PC remotely. It took me some time but to do CTRL + ALT + Delete on the remote PC I needed to press the following:

FN + CTRL + ALT + Left Arrow + Right Arrow.

When running Microsoft Remote Desktop it is the following:

FN + CTRL + ALT + Backspace (Delete)

Apple Mac - Freezes when another monitor is positioned close to it

At home I usually use an Apple Mac, recently I've needed to do work on a separate PC in the same location. I've noticed some strange behaviour with the Mac when I position the monitor of the PC near my Mac, the result is I can move the mouse pointer, but the mouse click does not work and also the keyboard does not respond. The cursor for the keyboard actually disappears and the Mac appears to be frozen apart from the ability to move the mouse. First time this happened I thought there was a problem with it so restarted it, but all I needed to do was move the PC's monitor a bit further away. 

The monitor that is causing the issue is a standard Dell one and the distance the monitor needs to be is very close, approx 150mm from the Mac. 

Security Shield - How I managed to remove this nasty fake program

Security shield is a fake anti-virus program that tries to get your credit card details by displaying a well designed and professional looking screen that tries to sell you it's fake software by listing viruses that it finds on your PC which do not actually exist. This is a very nasty virus, which after looking at solutions the way that worked for me to remove it from a Samsung NC10 was to do a CTRL+ALT+DEL while the screen was displayed and locate the .exe that was running, this will be some random letters followed by .exe. Once I located the name of the file I search the registry ('regedit' command from the run menu) for this file, and deleted any reference to it. After restarting the PC everything seemed to work fine and was back to normal.