Searching for specific system files like this is a primary vector for malware.
If your organization has a Volume License agreement:
Files included (example for Office 2019): download proplusww propsww2cab office high quality
proplusww.msi
proplusww1.cab
proplusww2.cab
proplusww3.cab
setup.exe
These files are digitally signed by Microsoft, ensuring high quality and authenticity.
Tools like PDQ Deploy, ManageEngine, or SCCM can pull directly from Microsoft repositories and push high-quality Office installs without manual CAB handling. Searching for specific system files like this is
Even with best practices, things go wrong. Here is the IT pro's triage guide.
Cause: Leftover registry keys from a low-quality or incomplete prior installation.
Solution: Run the Microsoft SARA tool (Setup Assistant Remediation Assistant) to clean uninstall. Files included (example for Office 2019):
proplusww
Now use a separate configuration.xml for installation, pointing to your local source:
<Configuration>
<Add SourcePath="C:\\OfficeSource\\ProPlus2021" OfficeClientEdition="64" Channel="PerpetualVL2021">
<Product ID="ProPlus2021Volume">
<Language ID="en-us" />
</Product>
</Add>
<Display Level="None" AcceptEULA="TRUE" />
<Property Name="SharedComputerLicensing" Value="0" />
<Property Name="FORCEAPPSHUTDOWN" Value="TRUE" />
<Property Name="DeviceBasedLicensing" Value="0" />
</Configuration>
Run:
C:\\ODT\\setup.exe /configure C:\\ODT\\install-config.xml
High Quality Guarantee: Because the source is local and all CABs (ProPlusWW1, ProPlusWW2) are present and validated, the installation will run without internet, without errors, and complete in under 10 minutes.