# Can't launch latest preview (7/17) on Windows 11

**URL:** <https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771>\
**Category:** Support\
**Created:** [July 18, 2025, 6:20pm UTC](https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771 "2025-07-18T18:20:08Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [July 18, 2025, 6:20pm UTC](https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771/1 "2025-07-18T18:20:08Z")

</div>

I just installed the latest preview on a windows 11 machine, and Slicer fails to launch after the splash screen. There is no failure in the error log either. I tried launching from the command line and same story, no error being printed out to indicate why it is not launch.

The only thing that might be suspicious is that I am on a RDP connection to this machine. But 5.8.1 launches perfectly fine.

Here are the log entries from the failed launch sessions:

```auto
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Session start time .......: 20250718_111700
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Slicer version ...........: 5.9.0-2025-07-17 (revision 33792 / 5338596) win-amd64 - installed release
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Operating system .........: Windows / Professional / (Build 22631, Code Page 65001) - 64-bit
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Memory ...................: 32436 MB physical, 37300 MB virtual
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - CPU ......................: GenuineIntel , 28 cores, 28 logical processors
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - VTK configuration ........: OpenGL2 rendering, TBB threading
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Qt configuration .........: version 5.15.2, with SSL, requested OpenGL 3.2 (compatibility profile)
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - DCMTK configuration ......: version 3.6.8, no SSL
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Internationalization .....: disabled, language=
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Developer mode ...........: enabled
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Application path .........: C:/Users/amaga/AppData/Local/slicer.org/Slicer 5.9.0-2025-07-17/bin
[DEBUG][Qt] 18.07.2025 11:17:00 [] (unknown:0) - Additional module paths ..: (none)
[DEBUG][Python] 18.07.2025 11:17:03 [Python] (C:\Users\amaga\AppData\Local\slicer.org\Slicer 5.9.0-2025-07-17\lib\Slicer-5.9\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:40) - Scripted subject hierarchy plugin registered: SegmentEditor
[DEBUG][Python] 18.07.2025 11:17:03 [Python] (C:\Users\amaga\AppData\Local\slicer.org\Slicer 5.9.0-2025-07-17\lib\Slicer-5.9\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:40) - Scripted subject hierarchy plugin registered: SegmentStatistics

```

---

<div class="post-metadata">

**Author:** ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Post date:** [July 18, 2025, 6:35pm UTC](https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771/2 "2025-07-18T18:35:55Z")

</div>

Yeah, I think this might be the RDP connection to the machine, launches fine for me on my Win11 machine. Will test through RDP on my end and report back.

---

<div class="post-metadata">

**Author:** ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Post date:** [July 18, 2025, 6:43pm UTC](https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771/3 "2025-07-18T18:43:17Z")

</div>

So, I was able to successfully launch the 7/17 installer while connected to my machine though RDP. Logs look identical to yours.

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [July 18, 2025, 6:44pm UTC](https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771/4 "2025-07-18T18:44:58Z")

</div>

Installer worked for me without any problems on RDP, what about launching the application? Any other ideas how to generate diagnostics to understand what’s blocking it?

---

<div class="post-metadata">

**Author:** ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Post date:** [July 18, 2025, 6:49pm UTC](https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771/5 "2025-07-18T18:49:18Z")

</div>

Sorry, i mistyped. I was able to launch the actual application fine as well through RDP.

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [July 18, 2025, 6:50pm UTC](https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771/6 "2025-07-18T18:50:58Z")

</div>

I managed to login into the system directly. It went a little further this time, I briefly saw “Setting up UI” (or somethign along that line) as the final step in the splash screen, and then it failed again.

So not RDP related on my end.

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [July 18, 2025, 11:38pm UTC](https://discourse.slicer.org/t/cant-launch-latest-preview-7-17-on-windows-11/43771/7 "2025-07-18T23:38:53Z")

</div>

This is most likely related to a regression that should be fixed following integration of [PR-8589](https://github.com/Slicer/Slicer/pull/8589) (`BUG: Fix crashes caused by range-based loops over temporary Qt containers`)