The file IRSETUP.EXE is not adware. It is actually part of the extremely common Setup Factory 6.0 installer builder product by Indigo Rose Software (www.indigorose.com). It is extracted to a temp folder when running a setup.exe created by Setup Factory 6.0 and used to handle the main installation tasks. It is deleted at the end of the installation process or at the next system reboot at the latest.
Setup Factory 6.0 is used by *millions* of setup.exe’s and many thousands of companies. The IRSETUP.EXE file itself is definitely not adware.
The same filename is Related to the 2020Search adware File irsetup.exe is related to adware 2020Search.