Issue
Facing the error 2503 during the installation of the Windows server monitoring agent.
Cause
During installation, the installer package files have to be written to the "C:\Windows\Temp" folder. When Windows is unable to write these files to this specific folder, error code 2503 is displayed.
Resolution
Perform either of the below actions:
- Provide "Full control" permission to the user for accessing the temp folder.

- Install the agent using an account with administrator access to the Temp folder.