CTRL-ALT-DEL via UltraVNC not working in Windows 7/2008(R2)

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By default, send CTRL-ALT-DEL does not work on windows 7/2008 at the login screen when using UltraVNC. This can be fixed by editing a group policy:

1) “Start menu” -> “Run…” – > gpedit.msc
2) Navigate to “Computer Configuration” -> “Administrative Templates” -> “Windows Components” -> “Windows Logon Options”
3) Double-click on the “Disable or enable software Secure Attention Sequence” parameter.
4) Check “Enable”, then select “Services” in the combobox.
5) Apply the modification

Source

  1. Gary Schultz
    Gary Schultz04-14-2012

    Found that enabling Remote Desktop in Windows 7 systems and Windows 2008 servers allowed UltraVNC to work.
    Tested with severial versions of UltraVNC that did not work or did not work consistently.
    This fixed the Crtl+ALT+Del and other problems. Still researching why… Can any one else confirm this????

  2. Rich Shealer
    Rich Shealer05-25-2012

    Thank you. This policy change worked on my Windows 7 32-bit workstation.

  3. joe
    joe07-04-2012

    Thanks for the instructions! Solved my CAD problem in W7

  4. Fernando
    Fernando10-08-2012

    Great job! It worked for me

  5. SidS
    SidS11-10-2012

    Did not solve my problem on Win 7, 64-bit virtual machine. I edited the group policy per instructions. I also have remote desktop enabled and UAC turned on. All to no avail 🙁

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  6. Steven Lee
    Steven Lee07-17-2013

    Run this from commandline:
    reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v SoftwareSASGeneration /t REG_DWORD /d 1 /f

    Worked for me on Windows 2008 R2.

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