Is there a bug in the msi file?
Hmmm I have seen this before. I has to do with if you ran a previous version of the PSU installer on this box that was messed up.
Can you try running this in PS?
ls Env:\UAPATH
the command return the PU path and one extra “C:\Program Files (x86)\Universal Automation”
Try removing the content of that env var and running the installer again.
Thanks, I will try that