SetupProd_OffScrub.exe is the official Microsoft Support and Recovery Assistant (SaRA)
Seeing at the top of your CPU or disk usage list is common, but should it concern you? Let's break down normal vs. problematic behavior.
Every month, Microsoft releases security or quality updates for Office via the Click-to-Run technology. Before applying the new version, the updater runs setupprodoffscrubexe to remove stale cached files from the previous Office installation. This prevents "dirty state" errors.