Inventor 2026 - Error & rollback When Insatlling

[MattH_Work]

Just going through the 2026 upgrades ( Inventor, AutoCAD, Vault & others )

Every single install fails & rolls back at around the 2 - 3 % mark

Although I am a local Admin, AV & UAC are off ( Autodesks's own 3 Golden rules ) the installer will ONLY work when I explicitly right-click and 'Run as Administrator'

Although ultimately not a massive issue, I thought it was worth saying something incase it can help others

[pendean]

The error is for VAULT PRO 2026, not Inventor. Fix your post's title please.

Then read this, it applies to all software with Install Error-5

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/The-install-couldn...

[MattH_Work]

The screenshot was just from the last one I installed, the error occurs with Inventor, AutoCAD, Vault, Nastran.......

[MattH_Work]

From the above tech article

Causes:

• Installer is being run over a network.
• Internet restrictions with webinstaller. 
• Corrupted product .pit file

No network, full download

Did not use web installer

Probably not a corrupt file, as the issue occurred with every single install

[mdavis22569]

If you have all 3 failing .. 

I'd look at the deployment ( if that's what you're using) 

Permissions .. 

I've installed AutoCAD / Inventor quite a bit since they came out (and no one using my links post) and I'm not seeing any issues reported by others .. 

When I see more than 1 .. this why I go back to the PC/Permissions/set up etc ... 

[weiser]

Hi there,

I just tried to install Inventor 2026 on Win10 x64:

Download the full package, place the Autodesk-Folder on top of drive C:\ and installed it by right click RUN AS ADMIN.

Additional software selected is only the content library (no DWG-Ture View or Electrical Catalog Browser)

Inventor setup is going up to 12-16% and then rolls back to 0% and stopps with the error-code 1073741515

Searching for this error-code I find some microsoft-issues with system files.... So I used this post to fix it:

https://answers.microsoft.com/en-us/windows/forum/all/file-system-error-1073741515/1a9afda8-fecc-4ca...

After rebooting I tried to install Inventor again with the same results.

Would be good to get some help here.

[weiser · Accepted solution]

I have received the following link from Autodesk support....

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/An-Error-occurred-...

After checking the registry (without result) I downloaded and installed the ODIS software and then ran the Setup.exe --noupdate as admin and then it worked. I can't say whether it was the ODIS software or the --noupdate option.

Maybe this will help ....