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