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  • Veeam Backup & Replication installer fails to launch with the error: "Only one instance of Veeam Backup & Replication Setup is allowed."
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Veeam Backup & Replication installer fails to launch with the error: "Only one instance of Veeam Backup & Replication Setup is allowed."

KB ID: 4304
Product: Veeam Backup & Replication
Published: 2022-04-22
Last Modified: 2022-04-22
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Challenge

When attempting to launch the Veeam Backup & Replication installer, the following error occurs: 
Only one instance of Veeam Backup & Replication Setup is allowed.
Only one instance of Veeam Backup & Replication Setup is allowed.

Cause

Another instance of the Veeam Backup & Replication Setup.exe is already running.

Solution

Open Task Manager and check if another Setup.exe process is already running.
Task Manager Example of Two different users attempting to launch setup.exe

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