DLP Agent 25.1 MP1 Installation Fails with Vontu Custom Action Error 15613 (Missing Visual C++ Redistributable x86)

Products

• Data Loss Prevention Core Package
• Data Loss Prevention Endpoint Prevent
• Data Loss Prevention Enterprise Suite
• Data Loss Prevention

Issue/Introduction

When upgrading or performing a fresh installation of the DLP Agent to version 25.1 MP1 on Windows 11, the installation fails even if the required Microsoft Visual C++ Redistributable(x86 and x64) are already installed on the machine. 
The installer GUI halts and displays the following error message:

Symantec Data Loss Prevention Installer Information:
Vontu Custom Action | ERROR: Installation can't proceed as Visual C++ redistributable x86 is not installed on this machine, error code: 15613

Environment

DLP Agent:25.1 MP1
Operating System: Windows 11 (64-bit)
Prerequisites: Microsoft Visual C++ 2015-2022 Redistributable installed(latest version 14.51.36231)

Cause

This issue occurs because Microsoft Installer (.msi) files executed directly (e.g., via double-clicking) run within the standard user's security context. Since Windows lacks a native "Run as Administrator" option for .msi files, the installer lacks the elevated privileges required to query the system registry or folders. As a result, it cannot verify existing Visual C++ Redistributable versions, triggering a false-positive installation requirement error.

Resolution

- To resolve this issue, the Symantec DLP Agent must be installed using the install_agent.bat file initiated from an elevated command prompt. This ensures the installer has the necessary administrative permissions to verify system prerequisites.

- Refer Install the DLP Agent for Windows Manually for step by step instructions.