Ctrl Alt Del wont work on Vista pc's

Ctrl Alt Del wont work on Vista pc's

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By Jasonehand - Tuesday, June 30, 2009

When i roll out ultravnc, latest version, and try to vnc into a vista pc that is at the login screen, i can see the login screen fine, but the ctrl alt del button won't work to let me log in to the pc, happens on every pc with windows vista, xp machines work just fine and i log in ok to them, the problem is just with vista pcs, we're running vista business here. any help appreciated, maybe an option in install or something?? thanks.

Jason Hand

jason.hand@cnmec.org

By Yury Averkiev (s-code) - Tuesday, June 30, 2009

Jason,
this is not a VNC Manager bug. The problem is with UltraVNC and Vista with UAC turned off. Googling for this problem returns many results. For example this one:
http://www.ocforums.com/showthread.php?t=576590

[Moved from: SmartCode VNC Manager \ Bug Reports]

By scottwilkins - Tuesday, July 07, 2009

Just as a suggestion, what I did to fix (get around) this problem is to use a registry change to disable the need for Ctrl-Alt-Del in order to login. My users like it better too, since they don't like doing that either. I know there are arguements from Microsoft for the use of Ctrl-Alt-Del, but I put that risk as very very very low. Basically I've got many more concerns that are worth much more of my time and effort than a Ctrl-Alt-Del concern, so I just turn it off. I do like that they have made it easier to turn it off in Vista and Windows 7 through dialog boxes though, but I wrote a .reg file that does it quicker and easier. Here is the contents of the .reg file:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]
"DisableCAD"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"DisableCAD"=dword:00000001