1. With the phone connected, open Windows Explorer
2. Right-click "CD Drive (F: (or whatever)) MotoCast" and select "Properties"
3. Click the "Hardware" tab
4. All drives on your system should be listed, including three for "Motorola XT912 USB Device." Select the one that lists "DVD/CD-ROM Drives" in the "Type" column.
5. Another "Properties" window will open. In the "General" tab, select "Change Settings."
6. Yet another "Properties" window will open. Select the "Driver" tab and click the "Disable" button. A warning will pop up stating, "Disabling this device will cause it to stop functioning. Do you really want to disable it?" Select "Yes."
7. Click "OK" on the two open "Properties" windows.
8. The next time you connect your phone via USB, you should get two Autoplay windows - one for "MOT" (Phone's internal storage) and "Removable Disk" (the micro SD card). The annoying Motocast CD drive (that you can't write to anyway) will no longer pop up.