Nope. Never used Itunes.Do you have Itunes installed. It did this to me once. I had to go into regedit and delete upper and lower filter values and reassign values. Try gearbox.com as they have info to walk you thru process. Do not delete anything until you have all the instructions
Can you see in in device manager? You might check device manager to see if it is present there before you do anything else. If it is present there and has a yellow ? next to it you may just need to disable and re-enable it there. The next thing I suggest is, with the power off unplug the power and the other cable to the drive. Restart the comp. for a minute or two and then shut it down again. Reinstall the cables making sure both ends of the non power cable are secure. Restart the computer. If the drive is good and properly connected, windows should detect it as new hardware and install it.