TF260949: The Test Agent Installer service cannot uninstall the following product because another installation program on ...

TF260949: The Test Agent Installer service cannot uninstall the following product because another installation program on this machine is in progress: %1. Wait a few minutes and then click 'Repair/Install Agents'. If the issue persists, use the Environment Viewer to connect to the machine and uninstall the old versions of the test agent manually%0