Nexus 7 not visible over USB via “adb devices” from Windows 7 x64

Question

I have done the obvious -- the USB driver was installed from the latest Android SDK, and USB debugging was turned on in the tablet.

When the Nexus 7 is connecte

Answer 1

In addition to setting USB connection/storage mode to "Camera (PTP)", I also had to enable developer mode, which has been hidden since 4.2.

1. Go to the Settings menu, and scroll down to 'About phone/tablet'. Tap it.
2. Scroll down to the bottom again, where you see 'Build number'.
3. Tap it seven (7) times. After the third tap, you'll see a playful dialog that says you're four taps away from being a developer. Keep on tapping and you've got the developer settings.
4. Now under Settings there's 'Developer options'. Tap it.
5. Tap 'USB debugging' to enable it.

Source: How to enable developer settings on Android 4.2