I'm having a strange problem onmy primary deesktop computer (which I'm using at the moment). When it wakes up after sleeping, Windows loses all wireless networks. At times, this also happens while the computer is running.. If I go into Device manager, I see that there is supposedly a driver problem with my TP-Link Archer T4U wireless dual band USB network adapter. Sometimes, if I disable/enable the adapter, it becomes recognized, but not connected. If I attempt to connect it, the taskbar icon goes from no connection available to available to connected and then back to unavailable. . If I restart the computer, it usually comes up connected. Although the adapter is USB 3.0 compatible, I've been using it on USB 2.
I've been using the 5 GHz radio on my DLink wireless AC router for my computers and Samsung Galaxy Tab4 tablet, and the 2.4 GHz radio for most other devices.
Interesstingly, my refurb Dell Optiplex 760 computer, running Windows 10 64 bit, has no problems connecting, using a Netgear dual band Wireless-N USB adapter.