PLCNEXT ENGINEER 2026.0 Fails to Install on Windows 11 25H2

[suprunchuk]

Version
2026.0
OS
Windows 11 25H2 (x64)
Description
I click the Install button, but the installer just freezes and that’s it.
Expected Behavior
The IDE installs successfully on supported Windows 11 versions, including 25H2.
Actual Behavior
Installation fails on Windows 11 25H2.

[suprunchuk]

Environment (PC Specifications)

• CPU: AMD Ryzen 9 9950X3D
• RAM: 64 GB
• Storage: 4T SSD
• GPU: Nvidia GeForce RTX 5080
• OS: Windows 11 25H2 installation with latest updates

[divisionbyzero]

Hi suprunchuk,
can you check if there’s a log file in C:\Users<yourWindowsUser>\AppData\Local\Temp

BR
DivisionByZero

[divisionbyzero]

I did encounter the same issue. It looks like the Windows UAC doesn’t appear when it should (only after I terminate the process).
When executing the setup with admin rights it gets installed.

[suprunchuk]

in the logs, I see only three identical errors with the Error code 0x800700e8.

[suprunchuk]

I did encounter the same issue. It looks like the Windows UAC doesn’t appear when it should (only after I terminate the process).</p>

When executing the setup with admin rights it gets installed.</p>

I confirm the hotfix: I ran the installer as an administrator and the IDE was installed.

if you run it without admin rights, nothing will be installed.

[divisionbyzero]

Might be related to this Microsoft Confirms UAC Bug Breaks App Install On Windows 11 And 10 Versions | Cryptika Cybersecurity