[URL] Force update now[URL] 2004 media creation tool.[URL] Easiest fix is to remove the wifi card and throw in the trash. There are no other issues with 3847.  Not supported does not mean not working. Then plug in USB 802.11ac DUAL BAND device and you are done. These devices drivers are built into windows nothing to download. Edimax-EW-7811UAC-Extension-Reception-Transmission [URL]  
The 1705 BT wireless drivers seem to be incompatible with the latest Windows 10 2004 update. I cannot connect with any device. I reverted Windows back to 1909 and things work.
Inspiron 3847, Windows 10 2004 update, BT devices no longer connect