Version-specific help

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

2025-12-14: 1.7.1.X-dev release builds need tests and feedback: https://forum.uvnc.com/viewtopic.php?t=38134

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

Version-specific help

Forum

Topics

Posts

Last post

1.7.x
Topics: 3

3 Topics

31 Posts

Last post CVE-2026-3787 clarification
by Rudi De Vos View the latest post
2026-03-11 20:55
1.6.x
Topics: 10

10 Topics

118 Posts

Last post Re: windows blinking
by Ludovic View the latest post
2026-02-15 12:08
1.5.x
Topics: 2

2 Topics

106 Posts

Last post Re: UltraVNC 1.5.0.X-dev - Fe…
by Ludovic View the latest post
2026-02-15 12:13
1.4.x
Subforums: 1.4.3.x, 1.4.2.x, 1.4.0.x
Topics: 38

38 Topics

353 Posts

Last post Re: UltraVNC 1.4.3.6 and Ultr…
by Ludovic View the latest post
2025-10-02 00:02
Olders
Topics: 1667

1667 Topics

9567 Posts

Last post Re: Local Cursor missing on W…
by Ludovic View the latest post
2026-02-17 21:29

Active topics

Replies

Views

Last post

CVE-2026-3787 clarification

Last post by Rudi De Vos « 2026-03-11 20:55

by Rudi De Vos » 2026-03-11 20:55

0 Replies

2487 Views

Last post by Rudi De Vos
2026-03-11 20:55
UltraVNC 1.5.0.X-dev - Feedbacks

Last post by Ludovic « 2026-02-15 12:13
Replies: 85
by Rudi De Vos » 2024-12-20 21:28
1

2

3
85 Replies

3452835 Views

Last post by Ludovic
2026-02-15 12:13
UltraVNC 1.5.0.0-dev - Feedbacks

Last post by Ludovic « 2026-02-15 12:13
Replies: 19
by Rudi De Vos » 2024-04-15 18:37

19 Replies

302160 Views

Last post by Ludovic
2026-02-15 12:13
windows blinking

Last post by Ludovic « 2026-02-15 12:08
Replies: 2
by JSLindo » 2025-07-16 19:21

2 Replies

99613 Views

Last post by Ludovic
2026-02-15 12:08
No Query Dialog appears

Last post by Ludovic « 2026-02-15 12:06
Replies: 1
by thomas80 » 2025-12-16 07:17

1 Replies

16917 Views

Last post by Ludovic
2026-02-15 12:06
listening mode stopped working after update to 1.7.1.0 x64

Last post by Ludovic « 2026-02-15 11:58
Replies: 16
by nagysifa » 2026-01-12 09:40

16 Replies

471185 Views

Last post by Ludovic
2026-02-15 11:58
UltraVNC 1.6.3.0-dev and UltraVNC SC 1.6.3.0-dev - Feedbacks

Last post by Ludovic « 2025-10-02 00:29
Replies: 14
by Rudi De Vos » 2025-06-02 20:25

14 Replies

820240 Views

Last post by Ludovic
2025-10-02 00:29
UltraVNC 1.6.2.0-dev and UltraVNC SC 1.6.2.0-dev - Feedbacks

Last post by Ludovic « 2025-10-02 00:26
Replies: 4
by Rudi De Vos » 2025-05-20 20:07

4 Replies

115723 Views

Last post by Ludovic
2025-10-02 00:26
UltraVNC 1.6.1.0 and UltraVNC SC 1.6.1.0 - Feedbacks

Last post by Ludovic « 2025-10-02 00:24
Replies: 39
by Rudi De Vos » 2025-05-07 19:59
1

2
39 Replies

715393 Views

Last post by Ludovic
2025-10-02 00:24
UltraVNC 1.6.0.0 and UltraVNC SC 1.6.0.0 - Feedbacks

Last post by Ludovic « 2025-10-02 00:15
Replies: 21
by Rudi De Vos » 2025-04-24 20:12

21 Replies

236567 Views

Last post by Ludovic
2025-10-02 00:15
UltraVNC 1.4.3.6 and UltraVNC SC 1.4.3.6 - Feedbacks

Last post by Ludovic « 2025-10-02 00:02
Replies: 45
by Rudi De Vos » 2023-10-20 18:39
1

2
45 Replies

837695 Views

Last post by Ludovic
2025-10-02 00:02
UltraVNC 1.4.3.5 and UltraVNC SC 1.4.3.5 - Feedbacks

Last post by Ludovic « 2025-10-01 23:43
Replies: 20
by Rudi De Vos » 2023-09-24 12:50

20 Replies

279017 Views

Last post by Ludovic
2025-10-01 23:43
UltraVNC 1.4.3.3-dev - Feedbacks

Last post by Ludovic « 2025-10-01 23:37
Replies: 7
by Rudi De Vos » 2023-08-24 18:07

7 Replies

142060 Views

Last post by Ludovic
2025-10-01 23:37
UltraVNC 1.4.3.0/1.4.3.1 and UltraVNC SC 1.4.3.0/1.4.3.1 - Feedbacks

Last post by Ludovic « 2025-10-01 23:34
Replies: 28
by Rudi De Vos » 2023-06-25 19:45

28 Replies

483913 Views

Last post by Ludovic
2025-10-01 23:34
UltraVNC 1.4.2.0 and UltraVNC SC 1.4.2.0 - Feedbacks

Last post by Ludovic « 2025-10-01 23:30
Replies: 39
by Rudi De Vos » 2023-04-16 14:15
1

2
39 Replies

630465 Views

Last post by Ludovic
2025-10-01 23:30
UltraVNC 1.4.0.9 - Feedbacks

Last post by Ludovic « 2025-10-01 23:20
Replies: 42
by Rudi De Vos » 2023-03-08 19:40
1

2
42 Replies

830980 Views

Last post by Ludovic
2025-10-01 23:20
UltraVNC 1.4.0.8 - Feedbacks

Last post by Ludovic « 2025-10-01 21:02
Replies: 12
by Rudi De Vos » 2023-02-12 21:05

12 Replies

358372 Views

Last post by Ludovic
2025-10-01 21:02
UltraVNC 1.4.0.6 and UltraVNC SC 1.4.0.6 - Feedbacks

Last post by Ludovic « 2025-10-01 20:58
Replies: 23
by Rudi De Vos » 2023-01-17 20:44

23 Replies

329022 Views

Last post by Ludovic
2025-10-01 20:58
UltraVNC 1.4.0.5 and UltraVNC SC 1.4.0.5 - Feedbacks

Last post by Ludovic « 2025-10-01 20:45
Replies: 11
by Rudi De Vos » 2023-01-15 13:46

11 Replies

204325 Views

Last post by Ludovic
2025-10-01 20:45
Disable Basic AUTH on Repeater's WebGUI

Last post by Prisma « 2025-07-30 08:48
Replies: 2
by Prisma » 2025-07-24 10:56

2 Replies

152412 Views

Last post by Prisma
2025-07-30 08:48
UltraVNC Viewer without load and save buttons

Last post by diezwei « 2025-06-02 15:18

by diezwei » 2025-06-02 15:18

0 Replies

101405 Views

Last post by diezwei
2025-06-02 15:18
Repeater behind MS AppProxy without basic auth

Last post by Prisma « 2025-05-27 12:20

by Prisma » 2025-05-27 12:20

0 Replies

109259 Views

Last post by Prisma
2025-05-27 12:20
No remote or local cursor

Last post by HunterZ « 2025-04-04 17:12
Replies: 1
by HunterZ » 2025-03-19 01:00

1 Replies

60256 Views

Last post by HunterZ
2025-04-04 17:12
Very slow UltraVNC when network adapters are combined with a virtual bridge

Last post by Rudi De Vos « 2025-02-02 19:21
Replies: 1
by mlei » 2025-02-01 18:29

1 Replies

70898 Views

Last post by Rudi De Vos
2025-02-02 19:21
Black screen on Windows 2019 Server

Last post by Rudi De Vos « 2025-01-30 20:14
Replies: 2
by cybermat » 2025-01-30 11:13

2 Replies

61783 Views

Last post by Rudi De Vos
2025-01-30 20:14
Problem with 2 local screens resolution lower than 2 remote screens

Last post by SergeB « 2025-01-15 12:22

by SergeB » 2025-01-15 12:22

0 Replies

89733 Views

Last post by SergeB
2025-01-15 12:22
Can not switch to just monitor #2 and #3

Last post by rvicker « 2024-11-12 21:44

by rvicker » 2024-11-12 21:44

0 Replies

105971 Views

Last post by rvicker
2024-11-12 21:44
How do I view Only One Monitor on 1.4.3.6

Last post by CPC « 2024-10-06 22:38
Replies: 1
by ICantSeeVNC » 2024-09-26 19:05

1 Replies

69885 Views

Last post by CPC
2024-10-06 22:38
Does 1.4.3.6 work with the MSRC4Plugin.dsm?

Last post by Rudi De Vos « 2024-09-21 07:27
Replies: 1
by MarloMang » 2024-09-20 07:59

1 Replies

66401 Views

Last post by Rudi De Vos
2024-09-21 07:27
Microsoft Windows 11

Last post by jBart « 2024-02-25 15:35
Replies: 3
by Rudi De Vos » 2023-05-31 19:54

3 Replies

370316 Views

Last post by jBart
2024-02-25 15:35
Refresh screen in "View Only" does not work

Last post by Gowapinou « 2024-02-19 09:26

by Gowapinou » 2024-02-19 09:26

0 Replies

92195 Views

Last post by Gowapinou
2024-02-19 09:26
The "full screen" display does not arrive on secondary monitor

Last post by Gowapinou « 2024-02-19 09:22

by Gowapinou » 2024-02-19 09:22

0 Replies

91492 Views

Last post by Gowapinou
2024-02-19 09:22
No Connection with SC

Last post by Com-In « 2024-02-18 17:35

by Com-In » 2024-02-18 17:35

0 Replies

92046 Views

Last post by Com-In
2024-02-18 17:35
How Do I Delete the server:port ip addresses from the drop down list

Last post by mo4ya1967 « 2024-02-16 20:54
Replies: 2
by mo4ya1967 » 2024-02-13 16:33

2 Replies

81695 Views

Last post by mo4ya1967
2024-02-16 20:54
Registry settings not working ?

Last post by Rudi De Vos « 2024-02-08 18:55
Replies: 1
by stoneater » 2024-01-31 15:10

1 Replies

67059 Views

Last post by Rudi De Vos
2024-02-08 18:55
How to unify local and remote clipboards

Last post by shedmeister « 2024-01-06 16:16

by shedmeister » 2024-01-06 16:16

0 Replies

74661 Views

Last post by shedmeister
2024-01-06 16:16
slow response to connect request

Last post by gneuner « 2023-12-25 20:53
Replies: 8
by gneuner » 2023-03-31 20:57

8 Replies

149921 Views

Last post by gneuner
2023-12-25 20:53
Auto Encoder issue

Last post by Ludovic « 2023-12-25 19:52
Replies: 1
by ryanb3 » 2023-02-28 18:20

1 Replies

85015 Views

Last post by Ludovic
2023-12-25 19:52
denied access with ip filtering turned on

Last post by Ludovic « 2023-12-25 19:52
Replies: 5
by dfeely » 2023-02-02 17:40

5 Replies

107095 Views

Last post by Ludovic
2023-12-25 19:52
Hiding remote cursor

Last post by Ludovic « 2023-12-25 19:49
Replies: 3
by User_Not_Present » 2023-03-23 05:03

3 Replies

93816 Views

Last post by Ludovic
2023-12-25 19:49
uvnc server loses connection

Last post by Ludovic « 2023-12-25 19:34
Replies: 2
by $3v|\| » 2023-05-26 15:07

2 Replies

96376 Views

Last post by Ludovic
2023-12-25 19:34
Can't open specified config file for reading

Last post by Rudi De Vos « 2023-12-14 19:22
Replies: 1
by shedmeister » 2023-12-03 21:52

1 Replies

103069 Views

Last post by Rudi De Vos
2023-12-14 19:22
Product Version is not update (UltraVNC for Windows)

Last post by Rudi De Vos « 2023-11-12 15:56
Replies: 1
by Gowapinou » 2023-10-06 10:36

1 Replies

86360 Views

Last post by Rudi De Vos
2023-11-12 15:56
Give me an example with WPP (WSUS) to keep the UVNC application up to date?

Last post by Rudi De Vos « 2023-11-12 15:53
Replies: 1
by Gowapinou » 2023-10-05 21:01

1 Replies

84128 Views

Last post by Rudi De Vos
2023-11-12 15:53
UltraVNC Viewer en VDI?

Last post by Rudi De Vos « 2023-10-05 17:39
Replies: 1
by AlfonsoPR » 2023-07-07 07:27

1 Replies

77662 Views

Last post by Rudi De Vos
2023-10-05 17:39
Autoreconnect through KVM-Switch (DesktopWndProc : WM_DISPLAYCHANGE)

Last post by Rudi De Vos « 2023-09-20 21:05
Replies: 3
by 3D-Admin » 2023-08-17 09:03

3 Replies

105237 Views

Last post by Rudi De Vos
2023-09-20 21:05
Is UltraVNC affected by CVE-2022-41975

Last post by Rudi De Vos « 2023-09-05 18:52
Replies: 1
by Sil3v » 2023-09-05 13:07

1 Replies

80118 Views

Last post by Rudi De Vos
2023-09-05 18:52
UltraVNC 1.4.3.1 x64 and vnc file

Last post by Rudi De Vos « 2023-08-28 19:21
Replies: 2
by balubeto » 2023-08-24 17:33

2 Replies

79361 Views

Last post by Rudi De Vos
2023-08-28 19:21
UltraVNC 1.4.2.2-dev - Feedbacks

Last post by Ludovic « 2023-07-06 20:34
Replies: 1
by Rudi De Vos » 2023-05-11 19:39

1 Replies

78954 Views

Last post by Ludovic
2023-07-06 20:34
Network port Blocked after file transfer

Last post by Milch008 « 2023-03-22 09:55

by Milch008 » 2023-03-22 09:55

0 Replies

80506 Views

Last post by Milch008
2023-03-22 09:55

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