I\'m running on Windows 7, and I\'ve updated all the drivers as it says on the Android developer website regarding using hardware devices. However, Eclipse is still not reco
It was a driver missing problem with me. I had enabled the USB debugging, tried changing the USB cable, tried reinstalling the Google USB drivers, but nothing came to my rescue.
Then ultimately I downloaded the device drivers as suggested here.
To make sure whether you have a device driver problem, go to:
And see if you have your Nexus shown as an "Android device" or as a device in "Others".
If it shows in "Others", your problem should be resolved by downloading & extracting this and then following these steps:
Finally, your device will show up as follows:

As soon as you do this, a popup will show up on your device asking for permission to debug. Once you accept, you are ready!