Same Problem here. I build up a new PC with Intel E3 Xeon with integrated Graphics. After Win10 x64 Installation is done, the first tool i installed was UltraVNC 64 Bit, but i noticed that my rotated Root Screen was unrotated in UVNC but obviously only the Graphics, Mouse Navigation seems to be rotated. Then i tried the 32 Bit Version, with same Effects.
The Video Hook Driver won't install for some reason...
I need UVNC very much one this machine, and i don't want to use RDP. So it would be very nice to fix this Problem.
Greetings from Germany
P.S.: I apologise my poor English.