what's your demand？If you need to get internet and sharing internet with Nokia.you should enable the SoftAP of MN821N ,it will sharing wifi of your network and you Nokia can connect it.

try to re -install the driver

I’m so sorry for you,Mine adapter is OK on win8.1 .What is your main board, and the win8.1 is 32bit or 64bit ? maybe i can help you~ do you use TP-LINK win8 driver,they have not provided win8.1...

I’m so sorry for you,Mine adapter is OK on win8.1 .What your main board, maybe i can help you~ do you use TP-LINK win8 driver,they have not provided win8.1 driver.

v1 v2 v3 the difference is hardware,and V3 may better than V1 V2. and the price may more expensive. you cannot use difference driver to upgrade the adapter. I think if you need to use on win 8,you...

I think you can return the adapter to shipping centre of TP-LINK, or change another adapter which can be used.