I have an Archer T4U (it's the newer style, the one that folds out), what I have noticed is that the speed I get with it is very inconsistent, it is generally the same connection quality as my smartphone but it will randomly start dropping connection and suddenly stop being able to provide a download speed above 1 megabit, my smartphone and other devices on our network are unaffected as is wired connection, I frequently have to reset my wireless properties in Windows 10 which sometimes helps, but not always. I also frequently get the dreaded "connected, no internet" message when connected to the wi-fi, again other devices are unaffected. It is plugged into a rear USB3 port, I have tried using a USB extension lead which has only made it worse. 

Any help in solving this will be much appreciated

I have already tried different drivers suggested on here which either don't fix anything or cause the reciever to not be recognised by Windows at all.