Control Panel\All Control Panel Items\Network and Sharing Center → Change advanced sharing settings: Private (current profile) → check "Turn on network discovery" and "Turn on file and printer sharing"
Wireless is disabled when Ethernet is connected - Dell I have a E5430 this is what we use for work i would connect the lan go to the Windows 7 "Control Panel --> All Control Panel Items --> Network and Sharing Center --> Change adapter settings --> look for the wifi thats disabled or disconnected --> right click diagnose --> then click fix --> this forces the laptop to enable it even though your wifi hardware switch is on --> it's a known dell Homegroup and Upgrades - social.technet.microsoft.com Feb 05, 2009
May 21, 2018 · Function Discovery Resource Publication relates to the "Network Discovery" setting you see in advanced sharing options in the control panel (Control Panel\All Control Panel Items\Network and Sharing Center\Advanced sharing settings). If some machines are working it may be they already had that setting turned on, but not sure why it is inconsistent.
May 02, 2011
Share Digital Media With Other Computers on a Home Network
May 22, 2018 Unhide Two Network Icons in the Control Panel