Adb Doesn't See My Usb-connected Device Anymore

I recently upgraded my (Windows 7) development environment to Eclipse 3.7.1 (Indigo). I have an HTC Magic (Rogers) running Android 2.1upd8.1, a Kobo Vox running 2.3.3 and a Samsung

Solution 1:

If you're using Windows, while your device is plugged in:

click Start>Right-click My Computer > Manage

It will open Computer Management.

Click onSystem Tools > Device Manager.

Expand the Universal Serial Bus controllers node from the center frame.

Identify your android device:
Look for yellow-exclamation-mark icons or a name like Android device/HTC something;

Right-click > Uninstall.

The drivers will be uninstalled and the device will be unrecognised again.

Take out the wire and reconnect it; This time Windows will look for the drivers again (as if it were new) and then it should be installed correctly once again.

The reason it should work in another USB port but not the original one is because the drivers were installed for that port only; if the drivers move, change or go missing it corrupts the installation; but the installation is only remembered on that USB port anyway.

Solution 2:

I recently had a problem with my computer detecting my HTC Desire after upgrading. I switched USB ports and now it detects it.

You can also try to update the software on your pc.