[Solved] Ctrl-Alt-Del not working at all in Windows 7

[yutt]

UVNC is running as a system service. Ctrl-Alt-F4 does nothing. The 'Send Ctrl+Alt+Del to host' button does nothing.

I am not behind any firewalls, I did notice other threads related to that and CAD.exe. This is not just a delayed CAD, it never occurs. I've had the PC sitting for several hours after pressing CAD and never seen any indication the client PC received the request.

Windows 7 Professional 64-bit with all the latest updates.

-cad.exe is in the Ultra VNC root directory
-running cad.exe manually also does nothing
-schook.dll is also being loaded.

1. ctrl+alt+del for work with uvnc on vista/7
require cad.exe + schook.dll for windows vista/7

How is running your ultravnc server on windows 7 ?

* application mode (manually by user request),
winvnc -sc_exit (this allow user input continue/cancel security of User Account Control of remote user without break connection and wait.

* system service (running before windows logon/welcome screen)
send ctrl+alt+f4

This post is in response to this thread:
[topic=16938][/topic]

[yutt]

Also using the 64-bit UVNC install, if that helps.

[yutt]

[deleted by yutt]

[yutt]

I've managed to get it working. I deleted ultravnc.ini and started over. The odd thing is, when I restore the old INI file, that also works now. I wish I knew what changed so it could help others who encounter this.

Possibly something with file permissions.

[yutt]

Alright, if I run UltraVNC Server not as service, task manager opens as expected. If I install it and run it as a service, currently nothing happens. This is back to my original problem.

Since it managed to break again somehow, I'll try to find the steps to resolution again.

[yutt]

Solved.

You cannot have UAC set to "Never Notify" in Windows 7. This is a bit annoying since we don't want users to have to deal with UAC popups, but at least Ctrl-Alt-Del works now which is more important.

[shanky]

Can you again explain what to do to sort out this ctrl+alt+del problem. I am not exactly clear what to do.??? This problem is coming in approx. 100 new win7 machines freshly installed.

[hancp]

Solution by B worked for me:

Run on host machine:

Code: Select all

C:\> reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v SoftwareSASGeneration /t REG_DWORD /d 1 /f 

(From thread https://forum.ultravnc.net/viewtopic.php?f=9&t=27079