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

XP Remote unable to connect to Windows 7 Hosts

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crm_ak
Posts: 2
Joined: 2009-10-30 18:31

XP Remote unable to connect to Windows 7 Hosts

Post by crm_ak »

I just upgraded 2 home PC's to Windows 7 and installed UVNC 1.0.6.5 on both and set one to listen on port 5900 and the other on port 9090. On my work laptop (XP SP 3 UVNC 1.0.6.5) that I have connected to my home network, I'm unable to connect to either Windows 7 PC and get the message, "Connection failed - Invalid protocol !". Prior to upgrading both home PCs, my work PC had no problems connecting. When I use Home PC 1 to connect to Home PC 2 using UVNC, I have no problems and visa versa. Both Home PC's belong to the Windows 7 "Homegroup" and they both have Norton Internet Security 2010 installed. Any ideas why the Windows 7 PCs can connect to each other but not an XP PC to either Windows 7 PC?

Thanks,
Chris :|
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crm_ak
Posts: 2
Joined: 2009-10-30 18:31

Re: XP Remote unable to connect to Windows 7 Hosts

Post by crm_ak »

I had success today when I tried the XP to Window 7 connection after I upgraded both to UVNC 1.0.8.0 and tried it with no DSMPlugin selected on both. For some reason, I was having problems with a DSMPlugin but I have no idea why as the file compared fine between the 2 systems. I later changed this to DSMPlugin SecureVNCPluginARC4.dsm and that worked too.
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