[2021] Stellaris Launcher won't open V2.6

So you never see our launcher, is that right? If so Please try this:

- exit the Steam app entirely
- uninstall Paradox Launcher v2 from the Windows "Apps and features" utility, if still present.

Delete the following folders if still present:

- C:/users//AppData/Local/Programs/Paradox Interactive/
- C:/users//AppData/Local/Paradox Interactive/
- C:/users//AppData/Roaming/Paradox Interactive/launcher-v2/
To see the AppData folder you'll need to enable View Hidden Items in File Explorer.

- run steam.exe as the Windows Admin user

- run the game from the PLAY button in Steam

IF that doesn't help, in this folder are some .log files:
C:/users//AppData/Local/Paradox Interactive/launcher-v2/
Please attach them here.

Note that you can run stellaris.exe directly from Windows Explorer, which bypasses the launcher.  

Illuminarchie said: something going wrong, mostly in reference to a file of msiexec?

This is a Windows problem: I've seen it a few times but I don't know what causes it.

Please go to C:/windows/system32/ folder and copy (NOT move!) msiexec.exe to the Steam folder where stellaris.exe is.

Then run the game from the Steam PLAY button. That should do it for you!