You're good, I started using it with 8 pro and later upgraded to 10 and have had had zero issues.

Exactly how is this capable of 1.3 Gbs when both bands have a max speed of 300 Mbs?

It doesn't lol... but for the price it is a great card...i bought the Router with it aswell they are easy to youe and great for gaming.

Is this compatable with windows 8.1?

Yes, works great. No drivers required, works out of box.

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NETIS WF2150 N600 Wireless Dual Band USB Adapter Compatible with Windows MAC Linux OS

Out of Stock