TP Link Wireless Adapter does not work

Thanks. I will do it and then post back.

Sorry for replying late...
As you suggested, I removed Eset firewall, but it did not work.
As I mentioned in an earlier post, I purchased and installed a PCI network adapter - again from TP Link - and it worked! There is now no problem at all.
I am finally relieved that I could regain net connectivity, but can't say that I am too happy about it, because the USB adapter is now virtually useless.
Thank you very much for spending your time on this. Much appreciated..

This weekend a friend gave me a TL-WN821N (Wireless N USB adapter). It is recognized, drivers are installed but it can't find any wireless radio. Seems to be the same problem you have.

I spent all afternoon trying to make the TL-WN821N work.
I've downloaded the latest drivers from TP-Link site and everything is OK (Device manager, Network etc) but it can't see any wireless.

As I also have Linux in my computer. I tried it under Linux and it worked without any issue. Was plug and play.
So the problem isn't the devices (Router and TL-WN821N). It's something in Windows.

Just made a very important discovery, and wanted to tell you about it.


As I said, I had installed a PCI adapter. It was also from TP Link - WN781ND. I then plugged the other adapter into a USB port, but both stopped working. But I found out one thing: whenever the antenna was right behind the USB port, it would not work. If I move it away from the port, it would work again. So I connected the USB adapter again, but this time I used an extension cable for USB to connect the adapter. I then placed it AWAY from the computer. You know what? It began to work! I then pulled the pci card out and tested again with the adapter away from the computer, and it worked.

So do you think the proximity of the adapter to the USB port has anything to do with it? It might be stupid but that is what happened in my case.

Tested again and again and confirmed this weird behaviour... whenever the adapter is plugged directly into any USB port it will not work. But it does work flawlessly when an extension cable is used.
Could you please try it?

It does NOT work when an extension cable is used.
As I wrote, it work perfect under Linux.
So the problem isn't the devices (Router and TL-WN821N). It's something in Windows.