So did a fresh install today on a RPi2 - using the same SD card and a Rpi-WiFi dongle and voila !! RESULT !! Not sure what happened last week but today I had no difficulties getting out of games , overclocking options showing up properly and WiFi kicked in straight away after login !! Works very well on RPi3 apart from WiFi - tried with and without Dongle  ! Looking forward to full RPi3 compatability - no pressure  :0) Keep up the good work !