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

依UltraVNC論壇的解說，

透過修改安全性，排除VNC無法登入的問題

原文:
To use this:

1.) Install UltraVNC 1.0.8.2.
2.) Replace the winvnc.exe executable with the one you downloaded (or built with the supplied patch).
3.) Run gpedit.msc
4.) Computer Configuration > Administrative Templates > Windows Logon Options
5.) Double-click on the "Disable or enable software Secure Attention Sequence".
6.) Check "Enable", then select "Services and Ease of Access applications" in the combobox and Apply the modification.
It should not be necessary to reboot the computer, this modification is considered "on the fly".
5.) Test it out!