I checked my antivirus logs and I found the issue.
I'm using Avast Free Antivirus, and it turns out Avast is automatically removing DSJ4.exe.
In the Quarantine section there are multiple entries for DSJ4.exe marked as:
IDP.Generic
Original location:
C:\Program Files (x86)\Deluxe Ski Jump 4\DSJ4.exe
So Avast is deleting the executable every time — even after I added exclusions. That explains why the file kept disappearing after every reboot and why the installer fails with the “MoveFile failed; code 5 – Access denied” error (because Avast blocks it or deletes it during installation).
It looks like a false positive detection by Avast.
The game is working now. I actually managed to install it and run it already yesterday. After that, I added both the installer file and the entire game folder to my antivirus exceptions, and since then Avast has stopped removing or quarantining DSJ4.
DSJ4 v1.12.0 bug reports
Re: DSJ4 v1.12.0 bug reports
CPU players are not working on the Stams HS115 hill. Is it just me? 