An outdated operating system may lack the required libraries or security protocols that OSPPREARM.EXE depends on. Run Windows Update and install any available updates before attempting the rearm again.
: Legitimate copies are bundled within the official Microsoft Office installer and placed automatically in your system directories. Download BEST Ospprearm.exe
C:\Program Files\Microsoft Office\Office16 (the folder number changes based on the version, e.g., Office14 for Office 2010). An outdated operating system may lack the required