Why Do Trend Micro Files Get Renamed To _Invalid?

There are a copy of reasons why Trend Micro’s OfficeScan Agent’s installation files get _invalid appended onto them:

• If you do not shut down the Trend Micro service properly
• If you are updating Trend Micro and run out of disk space
• If you get part way through the Trend Micro install or update and it fails

According to Trend Micro, you can simply remove the _invalid part of the file name; Trend Micro even provide a handy Powershell script to do this for you:

cd “C:\Program Files (x86)\Trend Micro\OfficeScan\PCCSRV”
Get-ChildItem -Recurse -Include *_invalid | Rename-Item -NewName { $_.name -replace “_invalid”,”” }

❗ Note: You have to run the PowerShell cmdlet as Administrator.
❗ Note: Don’t forget to change the directory in the first line to the location of your PCCSRV directory on the OfficeScan server hosting the installation files.