Yes, I see. Definitely the "Access denied" error I mentioned.

1. setup.exe starts
2. setup writes LSUNPACK decompression library into the temporary Windows folder (SUCCESS!)
3. setup uses the LoadLibrary Windows API to load the successfully created LSUNPACK library (FAILS!). This load process fails with ERROR_ACCESS_DENIDED in your case.

So "something" on this machine locks the component in the temporary Windows folder. It's a typical "false-postive".

Friedrich