I've been going quietly mad trying to fix a constant dropped connection issue with our Linksys E4200 router. There's lots of advice around tweaking the MTUs, upgrading firmware and disabling UPnP (a good idea anyway) but none of this helped at all. The connection just continually dropped, eventually came back, dropped again, ad nauseam.
The fix was to change the 5GHz and 2.4GHz networks to use different network names (SSIDs). I then connected to the 2.4GHz flavor and the connection is now solid.
I guess the problem was that by sharing the SSID devices would keep switching between the networks whenever they got the chance to connect to the juicy 5GHz flavor. The 5GHz network is flakier (higher frequencies having less range) and so the constant dropouts.
I had the same problem - devices connecting over the wireless connection would disconnect occasionally. I tried giving the 2.4 GHz and 5GHz channels different names, and the problem seems to have gone away.
Unfortunately my connection still drops randomly despite trying the above.
Hey Mark, I was also going through the same problem with Windows 10, then managed to solve as follows:
Applications & Gaming -> QoS -> WMM -> ENABLE IT
Administration -> Management -> CTF -> DISABLE IT
...and it's been a month and is working smoothly!
I hope this helps!