Microsoft Office 2007 had several updates, service packs (SP1, SP2, SP3), and language variations. An OfficeLR.cab file from a Service Pack 3 installation might not work with a Service Pack 1 installer. Downloading a random file from a third-party site ensures you have no way of verifying if the version matches your specific product key or installation media.
Missing officeLR.cab file during Office 2007 install - James IT officelr.cab download office 2007
Your original installation CD/DVD might have tiny scratches or dust that prevent the laser from reading large compressed files like OfficeLR.cab . Microsoft Office 2007 had several updates, service packs