Hi, Since you have an Inspiron 3542 and the Dell DW 1705 card this is what you want to install: Dell Wireless 1705 WiFi + Bluetooth Driver Version 10.0.0.318, A00   Dell Wireless 1705 WiFi + Bluetooth Driver
My bluetooth hasn't worked since I did a clean install of Windows 7 about a year ago. I was hoping it would work after upgrading to Win 10.  The WiFi works with the drivers from Windows update, versions 3.0.2.182 for WiFi and 10.0.1.1 for Bluetooth.  When   I try to install the drivers on this site for my service tag ( Service tag removed per privacy policy>) , the installation fails.  I finally notice the drivers on the site are for the DW 1704 which I believe is a Broadcom card.  The device manager definitely says qualcomm atheros 1705.  This has probably been my problem from the get go.  What two drivers should I install for this card? And, maybe the driver page page can be updated.  It was upgraded April last year after I complained the video driver and USB 3 drivers were out of date or missing  for window 7.  
windows 10 drivers for DW 1705