@Kathy_Z Thanks for your help Kathy. My operating system is Windows 10 - 64-bit. My T4U was alreadu updated with the driver you just sent me. Hopefullty there are other solutions to the problem....

Hi I just bought and installed the archer t4u adapter on my laptop. It works well on my 2,4 ghz and have improved the general internet experience alot. However, I cannot detect any 5 ghz wifi...