SOLVED: UltraVNC Can’t Send CONTROL ALT DEL on Windows 7 64bit or Server 2008 R2 and Screen Refresh Issues

UPDATE: Note that I have given up on UltraVNC and gone to RealVNC because it supports 4 monitors (and I find TightVNC just too slow when the screens are busy).  Pay the $30 for the Personal version and save the time.

BACKGROUND:

Sooo, I needed a fast VNC that would support multiple monitors so I can run some digital signage and digital artwork remotely on Win 7 64 Bit.  Previously I had used the standard REALVNC but it has problems with running as a service in 64bit PC’s, which I had previously tollerated on my Windows Vista implementations.  It’s been a few years and so I took another crack at it and found that the current build of UltraVNC:

• supports multiple monitors
• supports Windows 7 and Server 2008 R2
• supports 64 bit
• supports Active Directory tie in

NO CONTROL+ALT+DEL:

What it can’t seem to do is consistantly get past the Windows Login/Logon screen.  From several blogs, the cause is apparently that UAC has to be ENABLED, which in my case is not a problem, because I always leave UAC on under Windows 7.  CTRL ALT DEL usually has no apparent response from the host PC.  After playing with settings and reading blogs I found three suggested work arounds, two of which was a good one:

1. Disable the CONTROL ALT DEL (C A D) requirement via the registry (this is a VERY bad idea in corporate environments that should get you fired).
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2. Click the blue wheel (Ease of Access) icon in the bottom left corner of the screen and select TYPE WITHOUT THE KEYBOARD – ON SCREEN KEYBOARD.  The problem with this option was that the screen would not refresh automatically… which is annoying.   See REFRESH SOLUTION below.
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3. I also found that putting the ultraVNC client into FULL SCREEN sometimes let me use the SEND CONTROL+ALT+DEL key

NO SCREEN REFRESH:

From  http://www.appdeploy.com/messageboards/tm.asp?m=76509 I found the solution was to change the following settings in C:\PROGRAM FILES\ULTRAVNC\UltraVNC.INI

[poll]
TurboMode=1
PollUnderCursor=0
PollForeground=1
PollFullScreen=1
OnlyPollConsole=0
OnlyPollOnEvent=0
EnableDriver=1
EnableHook=1
EnableVirtual=0
SingleWindow=0
SingleWindowName=