Install - Uninstall The Office 2007 Compability Pack on command line

Install

Install - Office2007CompatabilityPack.exe /q /norestart

Or

msiexec /i O12Conv.msi /qn

Uninstall

Uninstall - msiexec /qn /x {90120000-0020-0409-0000-0000000FF1CE}