no, this is not a corporate system with special security software installed.
That is interesting... It's very possible that there are corporate policy restrictions regarding the installation of 3rd party software. If possible, can you reach out to your IT people to get their feedback on this.
This is not an attempt to punt the issue; we really have never seen an issue like yours, an 'IRSetup error'.
At the very least, and right after you see the error, we would need the installer log that's created here:
C:\Users\seand\AppData\Local\Temp (you would replace 'seand' with your Windows account name)
There is no sensitive data there so you can upload it to a shared drive of your choice (OneDrive, GoogleDrive, etc) and post a shared link here. Alternatively, you could PM the link to me
If its not creating the log file at all, we REALLY would want to know what your IT people have said about installing 3rd party software.
Sean Drohan
Stardock Product Lifecycle Manager