I assume that you are trying to remotely deploy the Unmanaged SEP clients on computers on which you have administrator access. Please follow the below steps to acheive the same.
1) Create a new client install settings (or edit an existing one) with "Silent" installation type.
2) Export a package with the client settings created above and select :Export an Unmanaged Client" and set the other parameters as per your needs and export the package.
3) Initiated the Client Deployment Wizard from the "Common Tasks" on the "Home Screen".
4) in the "Client Deployment Wizard" choose "Existing package deployment" and locate the folder where you saved the unmanaged package in step 2 and click Next and choose to deploy using "Remote Push" and proceed to client selection and then authentication and then the deployment.