I'm trying to set up a machine here with UltraVNC on Windows Vista with UAC off. The problem is, in this configuration, I can't send Ctrl + Alt + Del (CAD) to the Windows Vista machine, and so I'm stuck at the login screen, which is waiting for the CAD sequence. I'm joined to a domain, so I don't think I can disable the CAD requirement. I can't re-enable UAC either. I also tried using the on-screen keyboard, but it didn't seem to work. Is there a workaround or a solution?
The latest release of UltraVNC and VNCScan have resolved this issue. There's a pretty thorough post of it at http://vncscan.com/blog/2010/09/ultravnc-and-windows-7-ctrlaltdel/
There is a registry setting that can be changed that will allow Ctrl + Alt + Del to work. I'm not sure what the setting exactly is, as the incorrect setting was detected by VNC and provided me with the option to make the change itself. Here's how I went about it:
- Log in to the remote computer (so that when you connect via the VNC Viewer you won't be prompted with the "Ctrl + Alt + Del" screen).
- On another computer, use the VNC Viewer to connect to the remote computer.
- Press the Send Ctrl+Alt+Del to Host button on the toolbar. At this point, the VNC Server shows a message, "UAC is diabled, fix registry". Click OK.
- After this registry fix, Ctrl + Alt + Del commands work as expected.
This post TRUE solution for Ctrl-Alt-Del in Win7? + other issues gets credit for pointing me in the right direction.