Did you try to install the driver for Window 8 or 8.1？
With limited connectivity, IP address is 168.254...? Can you try static IP?

Thanks for the response M Diamond. I tried TL-WN722NC_V1_140918, with the 8.1 x64 version.

It took me a while but I figured it out. The driver wasn't actually the problem, because I could ping my router, although no other server, even using ip addresses to bypass dns resolution.

The problem was actually bitdefender. I had to upgrade it to the new windows 10 version, but I couldn't because I had no connectivity. After a long time trying to mess with the wifi drivers it dawned on me that it could be the antivirus/firewall. After uninstalling bitdefender I had connectivity immediately. Then I reinstalled the new version and everything worked.

Cheers.