How to manually reinstall the Windows Agent


Need to install or reinstall a Unitrends Windows agent.


Please keep in mind that the below process on installing the Unitrends agent via the MSI on a Hyper-V Host whether clustered or not can cause an unexpected reboot. Please perform these operations when migrations are possible or when a small amount of downtime is acceptable.

  1. If there is a Windows agent that is already installed, uninstall it using the Add / Remove Programs feature.  
    1. If you have problems uninstalling the agent, see the KB article Unable to uninstall Windows Agent.
    2. ​Rename the old PCBP folder to PCBP.old (just in case we need any logs at a late time).   
  2. You will now need access to the installation agent. There are two different sources you can use:
    1. Navigate to the network share on the Unitrends appliance.  
      1. To do this, open a Windows Explorer and type in the IP address of the appliance, such as: \\
      2. Open the Windows Agent folder and locate the correct 32 or 64 bit version of the agent that you need. Note:This is preferable to downloading the agent from the website as you will use the same version of agent that corresponds to the version that is installed on the Unitrends appliance.  
      3. Copy the needed agent file down to the server you are installing it on. (This will save future headache when trying to uninstall)
    2. Go to the Downloads page and download the needed version to the server.  Verify that you have the correct 32 or 64 bit version. 
  3. Double click the agent installer and finish up the installation. 
  4. Add the client if necessary on the Unitrends box.  
  5. Start a new backup job for the server that has the new agent to verify that everything is working correctly.  

Note: In Unitrends Version 9.0 or higher, agent push has been expanded and assets should be added using the Protected Assets menu:
Manual installation is only needed for hyper-V hosts, cluster nodes, or operating systems that do not support agent push.
(Strongly suggest having an open maintenance window for any host related agent updates) 

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