Hi Dominik Please confirm first whether or not the following key exists in the registry for the ESM core server HKLM\Software\Cyvera\Server\ Installation Path (REG_SZ) D :\Program Files\Palo Alto Networks\Endpoint Security Manager\Server\ If the above key does not exist, please manually create/add it. Next is, run the MSIEXEC command from a command prompt with the parameter to specify the installation path - open command prompt with admin privilege - from the command prompt, navigate to the location where the Traps installer is located - run the following command: msiexec.exe /i ESMCore_x64_4.0.2.26106.msi CYVERAESCFOLDER="D :\Program Files\Palo Alto Networks\Endpoint Security Manager\ " /L*v install.log Make sure , if you have Traps agent installed on the server, to disable the Service Protection on it. Additional recommendations for the upgrade can be found here: https://www.paloaltonetworks.com/documentation/40/endpoint/newfeaturesguide/upgradedowngrade-considerations/upgrade-to-traps-40
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