After more 2 000 000 (two million) views on forum for 1.5.0.x development versions... and 1.6.1.0, 1.6.3.0-dev versions
A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome

2026-04-01: After 1.7.x, 1.8.x release builds need tests and feedback: https://forum.uvnc.com/viewtopic.php?t=38158

2026-03-11: CVE-2026-3787 and CVE-2026-4962 - Clarification: https://forum.uvnc.com/viewtopic.php?t=38155

2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: https://forum.uvnc.com/viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page

2025-05-06: Forum password change request: https://forum.uvnc.com/viewtopic.php?t=38078

2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: https://forum.uvnc.com/viewtopic.php?t=37864

Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome

Help is very needed for:
Windows ARM/ARM64 support: https://forum.uvnc.com/viewtopic.php?t=38163 / https://github.com/ultravnc/UltraVNC/issues/346
macOS support: https://forum.uvnc.com/viewtopic.php?t=38164 / https://github.com/ultravnc/UltraVNC/issues/347
Linux support: https://forum.uvnc.com/viewtopic.php?t=38165 / https://github.com/ultravnc/UltraVNC/issues/348
*BSD support: https://forum.uvnc.com/viewtopic.php?t=38166 / https://github.com/ultravnc/UltraVNC/issues/349
*Solaris support: https://forum.uvnc.com/viewtopic.php?t=38167 / https://github.com/ultravnc/UltraVNC/issues/350

This server doens not have a valid password enbled

Should you have problems with the MS-Logon Plugin? Here is the place to look for help or report issues
redge
1000
1000
Posts: 6797
Joined: 2004-07-03 17:05
Location: Switzerland - Geneva

Post by redge »

SkyScrap wrote: it is recommanded in the guidelines not to run it as a service, when you have a firewall like zonealarm running.
Not true,
you just need to do something to ZoneAlarm for prevent this behavior.
related
[topic=4083][/topic]
UltraVNC 1.0.9.6.1 (built 20110518)
Windows OS: XP Home + Vista Business + 7 Home
Only experienced user, not developer
bilbus
8
8
Posts: 18
Joined: 2004-12-17 15:41

Post by bilbus »

did you install vnc inside remote desktop? i get that when i tryied to do that
TimuM
Posts: 3
Joined: 2007-10-07 17:48

Post by TimuM »

Guest_ wrote:
Marscha wrote:In service mode, the password is in HKLM\Software\ORL\WinVNC3\Default\Password
This is a REG_BINARY.
Okie. Problem can be solved by adding extra registry value called Password :)
I am having the same problem with UltraVNC 1.0.2... I will try to add Password Binary to the registry..and try this.. Is this a bug ?

Thanks
Timu
TimuM
Posts: 3
Joined: 2007-10-07 17:48

Post by TimuM »

bilbus wrote:did you install vnc inside remote desktop? i get that when i tryied to do that
I used terminal service for the installation..... Any solution..?


Thanks
Timu
TimuM
Posts: 3
Joined: 2007-10-07 17:48

Post by TimuM »

Guest_ wrote:
Marscha wrote:In service mode, the password is in HKLM\Software\ORL\WinVNC3\Default\Password
This is a REG_BINARY.
Okie. Problem can be solved by adding extra registry value called Password :)
I did add the Password to the registry...
This time I got Failed to connect error :(

Thanks
redge
1000
1000
Posts: 6797
Joined: 2004-07-03 17:05
Location: Switzerland - Geneva

Re: This server doens not have a valid password enbled

Post by redge »

> I used terminal service for the installation..... Any solution..?
vncpwd
Last edited by redge on 2007-10-07 19:08, edited 1 time in total.
UltraVNC 1.0.9.6.1 (built 20110518)
Windows OS: XP Home + Vista Business + 7 Home
Only experienced user, not developer
bilbus
8
8
Posts: 18
Joined: 2004-12-17 15:41

Re: This server doens not have a valid password enbled

Post by bilbus »

Dont install inside RDP, wont work. Install it on the console.

You can script a batch file to install.

You will need to download psexec.exe, part of PStools by microsoft/System Internals

REM Batch Start
REM Remote computer name
set ComputerName=192.168.1.2

NET USE \\%computerName%\IPC$ /user:administrator

REM This will stop the service, required if you are doing a remote upgrade

psexec \\%computerName% -s -i -d net stop"VNC Server"


REM Copy your local VNC files to the remote PC.
xcopy "C:\temp\VNCInstall\vnc" "\\%computerName%\C$\Program Files\ultraVNC\*.*" /r/i/c/h/k/e
xcopy "C:\temp\VNCInstall\Reg" "\\%computerName%\C$\" /r/i/c/h/k/e

REM Use Regedit to export the local VNC registry settings (from your PC or use included .reg file) to the remote PC. Note: If you prefer you can export the file locally and then copy it.

REM import the above registry file on the remote PC.

psexec \\%computerName% -s -i -d regedit /s C:\temp\VNCInstall\import.reg

REM You are using regedit on the remote PC to perform this command.

REM PsExec to install the remote winvnc service.

psexec \\%computerName% -s -i -d "C:\Program Files\ultravnc\winvnc.exe" -install

REM Use PsExec to start the remote "VNC Server" service.

psexec \\%computerName% -s -i -d net start "VNC Server"

REM Batch End

Import.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\ORL]

[HKEY_LOCAL_MACHINE\SOFTWARE\ORL\WinVNC3]
"DebugMode"=dword:00000000
"DebugLevel"=dword:00000000
"disabletrayicon"=dword:00000000
"AllowLoopback"=dword:00000000
"MSLogonRequired"=dword:00000000
"UseDSMPlugin"=dword:00000000
"DSMPlugin"=hex:00,ff,f8,00,70,a9,31,e7,88,0d,59,e2,a8,eb,be,00,00,00,00,00,40,\
e4,00,e1,68,34,01,e1,ff,ff,ff,ff,0c,ec,be,b2,63,e0,56,80,49,03,00,00,34,00,\
00,c0,b8,d0,a7,85,01,da,56,80,40,00,00,00,4c,ec,be,b2,78,34,01,e1,5c,d1,a7,\
85,4c,ec,be,b2,7c,5d,00,00,30,fb,ba,00,5c,d1,a7,85,44,ff,ba,00,2d,39,ea,77,\
88,a6,e7,77,ff,ff,ff,ff,a8,36,ef,77,14,b2,de,77,58,1d,de,77,1a,54,de,77,18,\
ff,ba,00,54,ff,ba,00,e0,53,9a,00,00,00,00,00,00,00,00,00,00,00,00,00,00,52,\
9a,00,08,2c,9a,00,00,00,00,00,9c,88,6c,85,00,00,00,00,00,00,00,00,20,ff,ba,\
00,68,88,6c,85,a4,ff,ba,00,55,56,df,77,e8,b1,de,77,ff,ff,ff,ff,e3,b1,de,77,\
04,39,43,00,e8,c4,14,00,00,2b,48,00,e0,52,9a,00,a4,ff,ba,00,b5,84,45,00,01,\
00,00,00,22,31,43,00,2c,76,43,00,00,00,00,00,08,2c,9a,00,03,9e,44,00,e0,52,\
9a,00,ce,2b,de,77,44,ff,aa,00

[HKEY_LOCAL_MACHINE\SOFTWARE\ORL\WinVNC3\Default]
"TurboMode"=dword:00000000
"FileTransferEnabled"=dword:00000001
"BlankMonitorEnabled"=dword:00000001
"DefaultScale"=dword:00000001
"UseDSMPlugin"=dword:00000000
"DSMPlugin"=hex:00,6b,c6,b1,f8,00,00,00,05,00,00,00,05,00,00,00,a8,55,98,e2,58,\
67,03,e1,02,00,00,00,fe,ff,f8,00,90,c8,1e,e3,a8,55,98,e2,c4,6b,c6,00,00,00,\
00,00,d8,54,01,e1,18,04,01,e1,ff,ff,ff,ff,28,6c,c6,b1,63,e0,56,80,49,03,00,\
00,34,00,00,c0,03,4d,00,00,30,fb,c0,00,40,00,00,00,44,ff,c0,00,2d,39,ea,77,\
88,a6,e7,77,ff,ff,ff,ff,a8,36,ef,77,14,b2,de,77,58,1d,de,77,1a,54,de,77,18,\
ff,c0,00,54,ff,c0,00,c8,52,3d,00,00,00,00,00,00,00,00,00,00,00,00,00,00,51,\
3d,00,f0,2a,3d,00,00,00,00,00,4c,2a,0f,86,00,00,00,00,00,00,00,00,20,ff,c0,\
00,18,2a,0f,86,a4,ff,c0,00,55,56,df,77,e8,b1,de,77,ff,ff,ff,ff,e3,b1,de,77,\
04,39,43,00,18,7a,14,00,00,2b,48,00,c8,51,3d,00,a4,ff,c0,00,b5,84,45,00,03,\
00,00,00,22,31,43,00,2c,76,43,00,00,00,00,00,f0,2a,3d,00,03,9e,44,00,c8,51,\
3d,00,ce,2b,de,77,44,ff,b0,00
"SocketConnect"=dword:00000001
"HTTPConnect"=dword:00000001
"XDMCPConnect"=dword:00000001
"AutoPortSelect"=dword:00000001
"InputsEnabled"=dword:00000001
"LocalInputsDisabled"=dword:00000000
"IdleTimeout"=dword:00000000
"QuerySetting"=dword:00000002
"QueryTimeout"=dword:0000000a
"LockSetting"=dword:00000000
"RemoveWallpaper"=dword:00000001
"Password"=hex:4f,31,6b,34,e9,74,6f,b9
"PollUnderCursor"=dword:00000000
"PollForeground"=dword:00000001
"PollFullScreen"=dword:00000001
"OnlyPollConsole"=dword:00000000
"OnlyPollOnEvent"=dword:00000001
"EnableDriver"=dword:00000001
"EnableHook"=dword:00000001
"EnableVirtual"=dword:00000000
lacomputerworld
Posts: 2
Joined: 2008-12-05 21:21

Re: This server doens not have a valid password enbled

Post by lacomputerworld »

i had this same problem and ive tried everything to fix it!!! nothing worked...
try going on this site and doing what it said. i had the problem solved in less than 10 mins...

hopefuly itll work for everyone else too... check it out
http://www.lacomputerworld.com/forum/sh ... .php?tid=8
Last edited by lacomputerworld on 2009-01-04 02:32, edited 1 time in total.
redge
1000
1000
Posts: 6797
Joined: 2004-07-03 17:05
Location: Switzerland - Geneva

Re: This server doens not have a valid password enbled

Post by redge »

lacomputerworld,

104 is out of date !!
UltraVNC 1.0.9.6.1 (built 20110518)
Windows OS: XP Home + Vista Business + 7 Home
Only experienced user, not developer
tylutki
Posts: 3
Joined: 2008-07-11 17:23

Re: This server doens not have a valid password enbled

Post by tylutki »

I had the same problem on Windows Server 2003. I fixed it by uninstalling everything, rebooting, installing the same program again, but did a few things different which caused it to work this time:

- Second time I did not install mirror/video drivers. (I just wanted it to work.)
- I checked out the Program Files directory for UltraVNC and ran check_install.exe from the command prompt.
- I started up the server from Program Files, ran Admin Properties, set the password, clicked ok.
- I was then able to connect remotely.
- I double checked the program was installed as a service, and starts up automatically.
MarceRos
Posts: 1
Joined: 2009-03-08 16:19

Re: This server doens not have a valid password enbled

Post by MarceRos »

Hi,

I had the same problem on a Windows XP Pro system. I did what tilutky suggested and could get the UVNC server to work (also had to uncheck the "Remove Aero (Vista)" checkbox). My problem now is how I make it work as a service. BY right-clicking the tray icon I get a menu with the "Install Service" option but when I click it and accept the default option of the "Run As" form, I get an error saying "Failed to open service control manager". I assume there's amore manual way to make it run as a service (SC???) but I'd appreciate if you can comment.

Thanks much,

Marcelo
Post Reply