Problem: Asus Nexus 7 not recognized by adb when correctly installed and connected
Setup: Asus Nexus 7 tablet Windows 7 64 bit OS
Steps taken:
From website below
http://www.asus.com/Tablets_Mobile/Nexus_7/HelpDesk_Download/
Download USB -> Nexus 7 USB driver for Windows
Unzip
Then follow the directions on this website below:
http://www.theandroidsoul.com/nexus-7-2013-drivers-installation-guide/
An Example for step #5, point it at this location:
C:\Users\Gene\Documents\Computer Setup (Installed Programs)\Asus Nexus Device Drivers\usb_driver