Veeam Support Knowledge Base
Updating Veeam Installer Service fails with "Another version of this product is already installed"

Updating Veeam Installer Service fails with "Another version of this product is already installed"

KB ID:	4282
Product:	Veeam Backup & Replication \| 11 \| 12 \| 12.1 \| 12.2 \| 12.3 \| 12.3.1 \| 12.3.2 Veeam Agent for Microsoft Windows \| 5.0 \| 6.0 \| 6.1 \| 6.2 \| 6.3 \| 6.3.1
Published:	2022-02-21
Last Modified:	2024-07-03

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Challenge

When updating the Veeam Agent for Microsoft Windows deployment on a machine that is part of a 'Computers with pre-installed agents' Protection Group, attempting to run VeeamInstallerSvc.msi causes the error message:

Another version of this product is already
installed. Installation of this version cannot
continue. To configure or remove the
existing version of this product, use
Add/Remove Programs on the Control
Panel.

Cause

This error occurs because the existing version of the Veeam Installer Service must be uninstalled before installing a new version.

Solution

The existing version of the Veeam Installer Service must be uninstalled before installing a new version.

Review the Update Procedure for Windows Computers section of the Veeam Agent Managed User Guide for more information on updating Windows computers associated with a 'Computers with pre-installed agents' Protection Group.

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