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"There is insufficient disk space on the target drive" occurs when installing OfficeScan agent

    • Updated:
    • 13 Mar 2020
    • Product/Version:
    • OfficeScan 11.0
    • OfficeScan 11.0
    • OfficeScan XG
    • OfficeScan XG.All
    • Platform:
    • Windows 2000 Advanced Server
    • Windows 2000 Professional
    • Windows 2000 Server
    • Windows 2003 Datacenter 64-bit
    • Windows 2003 Enterprise
    • Windows 2003 Enterprise 64-bit
    • Windows 2003 Server R2
    • Windows 2003 Standard
    • Windows 2003 Standard 64-bit
    • Windows 2008 Datacenter
    • Windows 2008 Datacenter 64-bit
    • Windows 2008 Enterprise
    • Windows 2008 Enterprise 64-bit
    • Windows 2008 Server Core
    • Windows 2008 Server R2 Enterprise
    • Windows 2008 Standard
    • Windows 2008 Standard 64-bit
    • Windows 2008 Web Server Edition
    • Windows 2008 Web Server Edition 64-bit
    • Windows 2012 Datacenter R2
    • Windows 2012 Enterprise
    • Windows 2012 Server Essential R2
    • Windows 2012 Server Essentials
    • Windows 2012 Standard
    • Windows 2012 Standard R2
    • Windows 2012 Web Server Edition
    • Windows 7 32-bit
    • Windows 7 64-bit
    • Windows 8 32-bit
    • Windows 8 64-bit
    • Windows Vista 32-bit
    • Windows Vista 64-bit
    • Windows XP Home
    • Windows XP Professional
    • Windows XP Professional 64-bit

When installing an OfficeScan agent through the browser-based installation method, the customer gets the following error:

Unable to install the Trend Micro Agent
There is insufficient disk space on the target drive.
Contact your OfficeScan administrator for assistance

The error occurs even if there is enough disk space available in the C:\ drive.


The client installation path is in ofcscan.ini under PCCSRV\:


If you do not change the value, the default is "$ProgramFiles\Trend Micro\OfficeScan Client".

If the installation path has been set to an absolute path like G:\ProgramFiles\Trend Micro\OfficeScan Client, and the keyword "$ProgramFiles" is not used, then the agent will try to install on the G:\ drive.

However, on some agent machines, G:\ drive does not exist, causing installation failure.

To resolve the issue, change the installation path back to its default value.

There are two (2) "WinNT_InstallPath" keys in ofcscan.ini. The following are their default values:

    WinNT_InstallPath=$ProgramFiles\Trend Micro\OfficeScan Client
    WinNT_InstallPath=$ProgramFiles\Trend Micro\OfficeScan Client
The agent initially uses the "WinNT_InstallPath" key under [INI_CLIENT_INSTALLPATH_SECTION]. If the path is invalid or cannot be used, it will then use the key under [INI_CLIENT_DEFAULT_INSTALLPATH_SECTION].
Troubleshoot; Install
Solution Id:
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