LTspice installation failing on Windows 11 with Error 1723 - IsWine.dll

Hi KhushiD ,

We did see this with certain earlier Windows 11 installations, . May need a new test installer. I'll see what I can do.

mike

Hi, I just had exact this same error, after downloading and running the latest installer for Win11.

MSI (c) (FC:50) [19:01:18:593]: Doing action: IsWine.dll
Action 19:01:18: IsWine.dll. 
Action start 19:01:18: IsWine.dll.
MSI (c) (FC:E0) [19:01:18:596]: Invoking remote custom action. DLL: C:\Users\arthu\AppData\Local\Temp\MSIBCB6.tmp, Entrypoint: IsWineDetected
MSI (c) (FC:34) [19:01:18:596]: Cloaking enabled.
MSI (c) (FC:34) [19:01:18:596]: Attempting to enable all disabled privileges before calling Install on Server
MSI (c) (FC:34) [19:01:18:596]: Connected to service for CA interface.
CustomAction IsWine.dll returned actual error code 1157 (note this may not be 100% accurate if translation happened inside sandbox)
MSI (c) (FC:50) [19:01:18:652]: Note: 1: 1723 2: IsWine.dll 3: IsWineDetected 4: C:\Users\arthu\AppData\Local\Temp\MSIBCB6.tmp 
Error 1723. There is a problem with this Windows Installer package. A DLL required for this install to complete could not be run. Contact your support personnel or package vendor.  Action IsWine.dll, entry: IsWineDetected, library: C:\Users\arthu\AppData\Local\Temp\MSIBCB6.tmp 
MSI (c) (FC:50) [19:01:20:360]: Product: LTspice -- Error 1723. There is a problem with this Windows Installer package. A DLL required for this install to complete could not be run. Contact your support personnel or package vendor.  Action IsWine.dll, entry: IsWineDetected, library: C:\Users\arthu\AppData\Local\Temp\MSIBCB6.tmp 

Action ended 19:01:20: IsWine.dll. Return value 3.
MSI (c) (FC:50) [19:01:20:362]: Doing action: FatalError

My OS version is: 

OS Name:                       Microsoft Windows 11 Home
OS Version:                    10.0.26200 N/A Build 26200

Is there any solution available in the meantime?

BR,

Arthur,

To add:
TimeCreated : 26-9-2026 19:01:18
Id          : 3077
Message     : Code Integrity determined that a process (\Device\HarddiskVolume3\Windows\System32\msiexec.exe) attempted
               to load \Device\HarddiskVolume3\Users\XXXX\AppData\Local\Temp\MSIBCB6.tmp that did not meet the Enterpr
              ise signing level requirements or violated code integrity policy (Policy ID:{0283ac0f-fff1-49ae-ada1-8a93
              3130cad6}).

Hi areon ,

We believe we solved this problem, and it should work with the latest installations. Will take a look.

areon said:

id not meet the Enterpr
              ise signing level requirements

Hmm, is this an enterprise-managed machine?

mike

Hi areon ,

Which version are you attempting to install?

No, it is not. It is my personal PC at home. I know it's a bit of a weird message in that sense, but still...

The latest version installer from the download page. I have now found the alternate installer, version 24.1.10. That one worked fine. But, as soon as I try to upgrade it fails with exact the same message. So, I do have a working version now, albeit a bit old.

Uhm, never mind :-) I just re-tried the upgrade process from the 24.1.10 test installer version and now it works fine. Could it be that I was installing/upgrading to 26.1 still (signage of the downloaded installer is of monday ‎14 ‎september ‎2026 23:39:30 ) and in the meantime 26.1.1 became available? Anyway, it's solved. We just do not exactly know how.

Thanks for your replies!

BR,

Arthur.

Hi areon ,

Hey, I'll take a free solution any time.

mike