When you run the Client Deployment Wizard in Symantec Endpoint Protection Manager (SEPM), the Browse Network tab in the Computer Selection window does not list any computers on the network.
The Computer Browser service has been disabled; the Client Deployment Wizard requires this service to be enabled.
To enable the Computer Browser service:
services.mscand click OK.
If the above steps do not help, see Preparing computers that run Windows Vista for remote client deployment