Ok, got this sorted thanks to a guy on an amazon review who had left instructions.. For anyone else suffering, here's the fix: By Paul Williamson on 29 July 2015 Style Name: AC1200 Verified...

M Diamond wrote Is it T4U or T4UH? http://forum.tp-link.com/showthread.php?82150-Windows-10-Compatibility-for-TP-LINK-Products HI, thanks for replying. Its the T4UH - seems to be V1, here's the link...

Model : Hardware Version : Not Clear Firmware Version : ISP : Hello. New ac1200 adapter plugged into PC running win 10. Drivers and utility installed. Device manager shows 'TP LINK Wireless USB...