Please refer to this KnowledgeBase document for more information about disabling the NI Service Locator and what will happen if you do so:
What Network Activity is LabVIEW Performing at Startup?For example, you will not be able to click buttons in the LabVIEW Help to place VIs, functions, and constants on the block diagram. Also, you will not be able to open VIs from the NI Example Finder.
Kelly H
LabVIEW Documentation
National Instruments