Had the same problem. issue fixed by not using the disc included, but instead downloaded the driver and installed via usb flash drive.
Really? that's interesting. i got it to work by going to the asus site and installing the older driver, the newer one from their website still craps out my system. I am going to wait a few weeks to see if they release an even newer one that will hopefully correct this issue.
Im also really unimpressed with my router, i am literally 1ft away from it with the wireless card for testing - on AC at 5Ghz and i am only getting 500mbps out of the theoretical 1700mbps. i have a D-Link DIR-865L that i got on sale on black friday last year for $120 but I am thinking that i may need to sell it and pickup an asus RT-AC66U.
thanks for the quick and informative comment
If you are that close just use ethernet, otherwise move the router at least 3ft away. Believe it or not but being too close is a bad thing.
Asus not working with Asus. Who would've known lol have you tried a firmware upgrade on the router?