apt-get install realtek-rtl88xxau-dkms
inxi -Fxs
Source - https://www.amazon.co.uk/Alfa-AWUS036AC-Long-Range-Dual-Band-Connections/dp/B00MX57AO4HOWEVER...........downloaded AWUS036AC_036EAC_ACH_linux_v4.3.8_12175.20140902.tar from their website, unpacked and ran install.sh (thinking this will never work but need to rule it out 1st), just before the install process finished, the blue light flashed a few times, OMG is it working straight away?
rm /var/lib/dpkg/lock
#(comment) followed by
apt-get -y install realtek-xxaudkms