I currently own the Asus RT-AC66U router and I love it. I’ve had it for over a year and it has been steady as a rock. But with this “cloud first, mobile first” (and customer last) philosophy of Microsoft, I was looking for a way to make my router block all that tracking that is in Windows 10 and trying to be in Windows 7 and 8. Block it at the router level and Microsoft can’t do a thing about it. According to Asus, the RT-AC66U router supports DD-WRT. This is a requirement. If your Asus router does not support DD-WRT, then this how-to will not help. Fortunately you don’t need to install DD-WRT. DD-WRT can a pain to install on a router. You do need to install the Merlin firmware, which you can download here.
This is an advanced how-to meant for more technical people.
Techs-on-Call Computer Repair Notes 