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Open powershell as administrator on the client
Copy the powershell code from CapaOne and paste it into the powershell terminal
Remove /qn from the code and run the powershell code
Install the CapaOne agent from the GUI and se if the service does get started succesfully
If the CapaOne Agent is not getting installed, check the anti virus to see if the CapaOne agent service is allowed.
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