2) The different between service mode and user mode is service mode will auto turn on VNC server once computer turn on, and user mode need manually turn of VNC server
3) This register mode is use to start your VNC server in service mode, no other function beside this
4)Actually you can notice if someone remote controlling your computer thru the icon, it will turn to black colour while somebody is controlling or accessing your computer
5)Cannot.. You have to manually connect to each individual server by type the computer name or computer ip address
6) VNC basically for people to remote access to other computer, so that is no other function for recorded or note what does Vnc viewer did on the server end, unless buy other application to track on it
7) No.. The reason as same as No 6. Cause you r let ppl remote controlling your's computer, the only way can choose is let viewer in or block viewer
8) As i know per VNC server can let multiple Viewer connect. and once viewer successfully access to server mean viewer can do anything he like including deleting, copying and etc .......