Make sure the latest Wifi driver is installed from the Dell Downloads page here: http://www.dell.com/support/home/us/en/19/Produ.. Microsoft Learn
One of the most common challenges users face is identifying the correct driver among the myriad options available. The Inspiron 15 3000 is a broad series that includes various sub-models, each potentially housing a different wireless card. Installing the wrong driver—for instance, an Intel driver when the laptop uses a Realtek adapter—will fail to resolve the issue. Furthermore, users often encounter error messages such as "Windows could not find a driver for your network adapter" or the dreaded missing network adapter icon in the system tray. These issues often stem from system updates that overwrite existing drivers or corruption caused by software conflicts. dell inspiron 15 3000 wifi driver
: Open your Downloads folder and double-click the .exe file. Make sure the latest Wifi driver is installed