2026-09-07: UltraVNC Extend Display: https://uvnc.com/products/ultravnc-extend-display.html | viewtopic.php?t=38201

2026-09-07: After more 5 000 000 (five million) views on forum for 1.8.x.x development versions...
A new stable version, UltraVNC 1.8.2.9 has been released: viewtopic.php?t=38203
Feedback is always welcome

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

2026-03-11: CVE-2026-3787 and CVE-2026-4962 - Clarification: viewtopic.php?t=38155

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

2025-06-25: 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: viewtopic.php?t=38095
Feedback is always welcome

2025-05-06: Forum password change request: viewtopic.php?t=38078

2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: 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: viewtopic.php?t=38163 / https://github.com/ultravnc/UltraVNC/issues/346
macOS support: viewtopic.php?t=38164 / https://github.com/ultravnc/UltraVNC/issues/347
Linux support: viewtopic.php?t=38165 / https://github.com/ultravnc/UltraVNC/issues/348
*BSD support: viewtopic.php?t=38166 / https://github.com/ultravnc/UltraVNC/issues/349
*Solaris support: viewtopic.php?t=38167 / https://github.com/ultravnc/UltraVNC/issues/350

Missing auth.dll after UltraVNC-Server-Upgrade

Should you have problems with the MS-Logon Plugin? Here is the place to look for help or report issues
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Mang
Posts: 1
Joined: 2005-12-30 13:07

Missing auth.dll after UltraVNC-Server-Upgrade

Post by Mang »

After executing the server upgrade installation (1.0.0 -> 1.0.0) to prevent the machine from requesting a reboot, I cannot login using MS logon.
Errormessage : You selected mc-login, but the auth.dll was not found. Check your installation.
So I have the reinstall 1.0.1, and that requires a reboot :-(
Does anybody know what I'm doing wrong, or is it a bug?

Best regards, Mang :-)
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redge
1000
1000
Posts: 6797
Joined: 2004-07-03 17:05
Location: Switzerland - Geneva

Post by redge »

An upgrade requires the following additional tasks:

* Stop winvnc service by running net stop WinVNC.

Setup command line parameters

...
Additional tools

FastPush is designed to push a VNC setup to a (large) number of computers. It supports UltraVNC.

http://doc.uvnc.net/features/authentication.html
UltraVNC 1.0.9.6.1 (built 20110518)
Windows OS: XP Home + Vista Business + 7 Home
Only experienced user, not developer
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CCETech
Posts: 2
Joined: 2006-04-11 17:38

Post by CCETech »

I installed UltraVNC via FastPush and I am getting the "auth.dll" error message. What can I do to avoid getting this message / fix the problem?
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