After more 1 000 000 (one million) views on forum for 1.5.0.x development versions... and 1.6.1.0, 1.6.3.0-dev versions A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095 Feedback is welcome
The mirror driver has been replaced by "desktop duplication api". This is implemented in the w8hook.
For server 2012 ( win8 OS engine) just install the w8hook ( same performance as the mirror driver on win7)